By Sienna AshfordUpdated November 2026
Straight router bits for wood are the workhorses of a router table and a handheld router alike. They cut clean, flat-bottomed grooves, dadoes for shelves, rabbets along panel edges, and flush trims for template work. Choosing the right one depends on your shank size, the cut diameter you need, whether you want a single set or a single bit, and how often you plan to cut hardwood versus plywood. The picks below were selected by comparing manufacturer specifications, brand reputation for carbide quality and flute geometry, and patterns that owners tend to mention in feedback, such as chip clearance, edge finish and set completeness. No bits were tested in a shop for this list.
Our top picks at a glance
- 1
TOP CHOICEBest overallFreud Double Flute Straight Bit (Eclipse Grind) 12-128View on Amazon - 2
TOP CHOICEBest for complete setupsSICWOOD 6Pcs Straight Router Bit Set 1/4 ShankView on Amazon - 3
TOP CHOICEBest for fine joinerySICWOOD 7Pcs Straight Router Bit Set 1/4 ShankView on Amazon - 4
Best for dado and groove rangeCarbide Tipped Double & Single Flute Dado Straight Router Bit Set 7PcsView on Amazon - 5
Best budget pickDado Straight Cut Router Bits 9Pcs Carbide Set 1/4" ShankView on Amazon - 6
Best for template and pattern workFreud 42-104 Flush Trim BitView on Amazon - 7
Best for small router setsProfessional Double Flute Straight Router Bits 1/4 Inch ShankView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| Freud Double Flute Straight Bit 12-128 | Clean grooves in hardwood | Tico hi-density carbide, Eclipse grind |
| SICWOOD 6Pcs Straight Router Bit Set | Complete starter set for dadoes and grooves | Six cut diameters from 1/4″ to 3/4″ |
| SICWOOD 7Pcs Straight Router Bit Set | Fine joinery and small grooves | Seven sizes from 1/8″ to 1/2″ |
| Carbide Tipped Dado Straight Router Bit Set 7Pcs | Dado and groove work across sizes | Double and single flute geometry |
| Dado Straight Cut Router Bits 9Pcs | Budget-minded setups with wide range | Nine cut diameters up to 3/4″ |
| Freud 42-104 Flush Trim Bit | Template and pattern routing | 1/2″ bearing for flush trimming |
| Professional Double Flute Straight Router Bits | Compact router kits | Four sizes, 1/4″ shank |
Freud Double Flute Straight Bit (Eclipse Grind) 12-128
Freud Double Flute Straight Bit (Eclipse Grind) with Tico Hi-Density Carbide – 2 Cutters, 24000 RPM, 2" Height, 1/2" Diameter, 4-1/8" Length, 1/2" Shank – 12-128 If you want more background, see Best Router Bits.
Best for: Clean, precise grooves and dadoes in hardwood
This is a single bit for woodworkers who want one dependable straight bit rather than a set. It suits shops that cut hardwood regularly and care about edge quality on the cut face. It is a reasonable choice for an upgrade from a bit that tears out at the exit point.
Key specs
- Double flute design with Eclipse grind
- Tico hi-density carbide cutters
- 1/2″ cutting diameter, 2″ cutting height
- 1/2″ shank, 4-1/8″ overall length
- Rated up to 24,000 RPM
Pros
- Strong, consistent cuts in hardwood
- Good chip clearance for a bit of this size
- Well-known brand with broad availability of replacement parts
Cons
- Only one diameter, so you will need more bits for other widths
- Requires a 1/2″ collet, which some compact routers do not accept
Bottom line: Pick this if you want one high-quality straight bit for hardwood work and already own a router with a 1/2″ collet.
SICWOOD 6Pcs Straight Router Bit Set 1/4 Shank
6Pcs Straight Router Bit Set 1/4 Shank, Double Flute Straight Bit Dado Straight Cut Router Bit, Cut Dia 3/4", 5/8", 1/2", 3/8", 5/16", 1/4", Straight Router Bit for Woodworking Groove by SICWOOD
Best for: Complete setup for dadoes and grooves
This set suits someone building a first collection of straight bits for shelving, cabinet carcases and drawer runners. The 1/4″ shank fits most handheld routers.
Key specs
- Double flute straight design
- 1/4″ shank
- Cutting diameters: 1/4″, 5/16″, 3/8″, 1/2″, 5/8″, 3/4″
- Carbide tipped cutters
Pros
- Covers the most common dado and groove widths
- Shank size works with most compact routers
- Good value for a full range in one purchase
Cons
- Owners sometimes note that the carbide edge is less refined than premium single bits
- Smaller diameters may need slow feed rates in dense hardwood
Bottom line: A sensible pick for beginners and hobbyists who want a broad set of dado widths at once.
SICWOOD 7Pcs Straight Router Bit Set 1/4 Shank
7Pcs Straight Router Bit Set 1/4 Shank, Double Flute Straight Bit Dado Straight Cut Router Bit, Cut Dia 1/8" 5/32“ 3/16” 1/4“ 5/16” 3/8“ 1/2”, Straight Router Bit for Woodworking Groove by SICWOOD
Best for: Fine joinery and small grooves
This set extends down to 1/8″ and suits work such as box-joint slots, thin plywood grooves and small inlay recesses that the 6-piece set does not cover.
Key specs
- Double flute straight design
- 1/4″ shank
- Cutting diameters: 1/8″, 5/32″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″
- Carbide tipped cutters
Pros
- Covers small diameters that many sets skip
- Useful for thin stock and detail grooves
- 1/4″ shank compatibility with common routers
Cons
- Smallest bits are fragile and need light passes
- Does not include 5/8″ or 3/4″ widths for larger dadoes
Bottom line: Choose this if your projects lean toward fine joinery and thin-stock grooves rather than wide shelf dadoes.
Carbide Tipped Double & Single Flute Dado Straight Router Bit Set 7Pcs
Carbide Tipped Double & Single Flute Dado Straight Router Bit Set 1/8",5/32",3/16",1/4",5/16",3/8",1/2" for Woodworking 7Pcs Straight Cut Router Bit Set 1/4" Shank,1/8" to 1/2" Cutting Dia.
Best for: Dado and groove work across a wide size range
This set combines double and single flute geometry, which some woodworkers prefer for clean bottoms in dadoes and for plywood, where the single flute can help clear chips.
Key specs
- Double and single flute designs
- 1/4″ shank
- Cutting diameters: 1/8″ to 1/2″
- Carbide tipped cutters
Pros
- Mixed flute styles suit both hardwood and plywood
- Covers a wide range of groove sizes
- Good for dado and rabbet work on a router table
Cons
- Single flute bits can leave a rougher surface in some hardwoods
- Smaller shank diameter limits heavy-duty use
Bottom line: A good match for shops that cut both hardwood and sheet goods and want one set for dadoes.
Dado Straight Cut Router Bits 9Pcs Carbide Set 1/4″ Shank
Double & Single Flute Dado Straight Cut Router Bits,Include 1/8",5/32",3/16",1/4",5/16",3/8",1/2",5/8",3/4" Cutting Diameters 9Pcs Carbide Straight Router Bit Set 1/4" Shank，for Woodworking
Best for: Budget-minded setups with a wide size range
Nine cutting diameters in one set makes this the most complete option on the list by count. It fits woodworkers who want to cover many joinery sizes without buying separate bits.
Key specs
- Double and single flute designs
- 1/4″ shank
- Cutting diameters: 1/8″, 5/32″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″, 5/8″, 3/4″
- Carbide cutters
Pros
- Widest diameter range in this list
- Works with compact handheld routers
- Good coverage for shelving, grooves and rabbets
Cons
- Budget sets often show more variation in carbide edge quality
- Owners recommend sharpening or inspecting bits before heavy production use
Bottom line: Best for hobbyists who want the most sizes in a single case and accept some trade-off in edge refinement.
Freud 42-104 Flush Trim Bit
Router Bits, Flush Trim Bits, used for pattern work, use on portable or table mounted routers, for hardwood plywood softwood Freud 42-104: 1/2" (Dia.) Bearing Flush Trim Bit
Best for: Template and pattern routing
A flush trim bit uses a bearing to ride along a template or the edge of a workpiece. It is the right tool when you want a router to copy a shape exactly, such as trimming laminate or replicating a curved part.
Key specs
- 1/2″ bearing diameter
- Designed for pattern work and flush trimming
- Suitable for hardwood, plywood and softwood
- Usable in portable or table-mounted routers
Pros
- Reliable bearing-guided cut for template work
- Works in both handheld and router table setups
- Brand known for consistent bearing quality
Cons
- Not suited to freehand dadoes or grooves
- Requires a template or guided edge to be useful
Bottom line: Choose this for pattern and flush-trim jobs. It is a specialist bit, not a general straight bit.
Professional Double Flute Straight Router Bits 1/4 Inch Shank
Professional Double Flute Straight Router Bits 1/4 Inch Shank, Flush Trim Router Bit Set, Cutting Diameter Respectively 1/4", 5/16", 3/8", 1/2".
Best for: Compact router kits and light-duty straight cuts
This four-bit set with 1/4″ shank is a practical choice for compact routers and small projects such as picture frames, box lids and shelf grooves in softwood.
Key specs
- Double flute straight design
- 1/4″ shank
- Cutting diameters: 1/4″, 5/16″, 3/8″, 1/2″
- Includes flush trim style bits in the listing
Pros
- Compact set suits small router kits
- Covers the most-used mid-range widths
- Simple to store and organize
Cons
- Limited diameter range compared with larger sets
- Owners doing heavy hardwood work may want a larger shank
Bottom line: A tidy, focused set for light to medium work with a compact router.
Buying Guide
Shank size
Most straight bits come with either a 1/4″ or 1/2″ shank. A 1/4″ shank is common on compact handheld routers and is fine for bits up to about 1/2″ in diameter. Larger cuts and heavy hardwood work are better served by a 1/2″ shank, which resists deflection. Check your router’s collet before buying, since a mismatch means the bit will not seat.
Good picks for this: SICWOOD 6Pcs Straight Router Bit Set 1/4 Shank, Freud Double Flute Straight Bit 12-128
Cut diameter range
Think about the widths you actually cut. Common shelf dadoes for 3/4″ plywood use a 3/4″ bit, while box joints and thin inlay grooves often need 1/8″ to 1/4″. A set that covers 1/8″ through 3/4″ gives the most flexibility, but a single bit in the size you use most often may cut cleaner.
Good picks for this: Dado Straight Cut Router Bits 9Pcs, SICWOOD 7Pcs Straight Router Bit Set
Flute design
Double flute bits cut faster and leave a smoother finish in hardwood. Single flute bits clear chips more easily, which helps in plywood and softwood, but can leave a rougher bottom in dense wood. Many dado sets mix both styles so you can match the bit to the material.
Good picks for this: Carbide Tipped Double & Single Flute Dado Straight Router Bit Set 7Pcs, Freud Double Flute Straight Bit 12-128
Carbide quality and edge finish
Carbide grade affects how long a bit holds an edge and how clean the cut is. Tico carbide, a brand-specific grade used by Freud, is widely recognized for consistency. When comparing sets, look for descriptions that specify carbide tips rather than generic steel. Inspect the cutting edges for chips or uneven brazing before first use.
Good picks for this: Freud Double Flute Straight Bit 12-128, Freud 42-104 Flush Trim Bit
Cutting height and depth of cut
Cutting height determines how deep a single pass can go. A bit with a 2″ cutting height can handle thick stock in one pass, which reduces burning and tear-out. Plan to take shallower passes on narrow bits, especially those under 1/4″, and never push a small bit to full depth in one go.
Good picks for this: Freud Double Flute Straight Bit 12-128, Professional Double Flute Straight Router Bits 1/4 Inch Shank
Use case: dadoes, grooves, rabbets or pattern work
Match the bit to the job. Dadoes and grooves need straight bits with flat bottoms. Rabbets need a bearing-guided bit or a fence. Pattern and flush-trim work calls for a bearing bit so the cut follows a template. Buying the wrong type is one of the most common mistakes, so decide your main use before choosing a set.
Good picks for this: Freud 42-104 Flush Trim Bit, SICWOOD 6Pcs Straight Router Bit Set 1/4 Shank
Care and storage
Keep bits in a case that protects the cutting edges. Clean pitch and resin off the flutes with a suitable cleaner, and avoid running bits in the wrong direction on a handheld router. Dull carbide cuts poorly and can burn wood, so have bits sharpened by a qualified service when edges wear.
Good picks for this: Dado Straight Cut Router Bits 9Pcs, Professional Double Flute Straight Router Bits 1/4 Inch Shank
FAQ
What is the difference between a straight bit and a dado bit?
A straight bit is the general term for a bit with a flat cutting edge that cuts a straight-walled groove. A dado bit is a type of straight bit, usually wider, used to cut the groove that holds shelves or partitions. Many sets sold as “dado sets” are simply straight bits in a range of diameters.
Can I use a straight bit in a handheld router?
Yes. Straight bits work in both handheld and table-mounted routers. For handheld work, use a fence or guide, take shallow passes, and move the router in the correct direction, against the bit’s rotation.
Which shank size should I choose?
Check your router’s collet first. Many compact routers take 1/4″ shanks, while larger routers use 1/2″. Larger shanks resist deflection better for big cuts, so choose 1/2″ if you cut wide dadoes or hardwood regularly.
Do I need a set or a single bit?
If you cut many different widths, a set saves money over time and keeps everything in one case. If you mostly cut one size, a single high-quality bit may give cleaner results and better long-term edge retention.
What is a flush trim bit used for?
A flush trim bit has a bearing that rides along a template or existing edge. It is used to copy shapes, trim laminate or flush edges to a pattern. It is not designed for freehand grooves or dadoes.
How do I keep straight bits cutting cleanly?
Clean resin from the flutes, store bits in a protective case, and avoid forcing them through thick stock. Replace or sharpen bits when they start burning wood or leaving a rough edge.
Is a double flute or single flute bit better?
Double flute bits are generally better for smooth cuts in hardwood. Single flute bits clear chips more easily and suit plywood and softwood. Many woodworkers keep both styles for different materials.
Conclusion
For most woodworkers, the best starting point is a complete straight bit set that covers the dado and groove widths you use most. The SICWOOD sets and the Dado Straight Cut Router Bits 9Pcs give broad coverage, while the Carbide Tipped Dado set adds single flute geometry for plywood. If you want a single high-quality bit for hardwood work, the Freud Double Flute Straight Bit is a dependable choice. For template and pattern work, the Freud 42-104 Flush Trim Bit is the right specialist tool. Match your shank size to your router, and choose the flute style to suit your most common material.
Sources
- Consumer safety guidance on power tool use, including guards, eye protection and safe operating practices (cpsc.gov)
- Workplace requirements for woodworking machinery and cutting tool guarding (osha.gov)
- Wood properties and species characteristics that affect how hardwood and softwood respond to cutting (fpl.fs.usda.gov)
Related reading
- Top 7 CNC Router Wood Signs Picks: Bits and Kits for Sign Making
- Top 7 Best CNC Router Bits for Wood Compared for Every Project
- Top 5 Wood Working Router Bits Compareds for Every Project
About Sienna Ashford
Sienna researches and writes buying guides and how-to articles on woodworking. Picks are based on product specifications, brand reputation and patterns in owner feedback, and are updated as new models come out.
