Skip to content
BuyOnceRight: buy once, buy right
CMT 81131 Contractor Straight Bit, 3/4-Inch

CMT

CMT 81131 Contractor Straight Bit, 3/4-Inch

  • 3/4-inch diameter
  • Micro-grain carbide
  • Anti-kickback body
  • 1/2-inch shank
Check price on Amazon

Sponsored link · confirm price and availability on Amazon · updated

On this page

Is the CMT 81131 Contractor Straight Bit, 3/4-Inch worth it?

Yes, for the right buyer. The CMT 81131 Contractor Straight Bit, 3/4-Inch ranks #6 in our Best Straight Router Bits 2026 list (best large diameter). Its biggest strength: 3/4-inch diameter is the correct size for 3/4-inch plywood dado joints and shelf dadoes. The main caveat: large diameter requires full-size router with sufficient horsepower.

Overview

What the CMT 81131 Contractor Straight Bit, 3/4-Inch does well

And anti-kickback body reduces the catch risk at large diameters where more material is engaged. Keep in mind that large diameter requires full-size router with sufficient horsepower.

Specs that matter

Key features

  • 3/4-inch diameter
  • Micro-grain carbide
  • Anti-kickback body
  • 1/2-inch shank
The trade-offs

Pros & cons

Pros

  • 3/4-inch diameter is the correct size for 3/4-inch plywood dado joints and shelf dadoes
  • Anti-kickback body reduces the catch risk at large diameters where more material is engaged
  • 1/2-inch shank for the stability required at 3/4-inch cutting diameter
  • CMT micro-grain carbide maintains sharpness better than standard carbide

Cons

  • Large diameter requires full-size router with sufficient horsepower
  • Anti-kickback limits maximum feed rate slightly
Fit check

Should you buy the CMT 81131 Contractor Straight Bit?

Think twice if this matters to you

  • Large diameter requires full-size router with sufficient horsepower
  • Anti-kickback limits maximum feed rate slightly
Where it ranks

Featured in 1 best-of list

ListRank
Best Straight Router Bits 2026· Best Large Diameter#6 / 8
Cross-shop

Alternatives to the CMT 81131 Contractor Straight Bit, 3/4-Inch

Products ranked near it in our research, each better for a slightly different buyer.

Buying advice: woodworking

  1. Clamps, a combination square, a good saw and a drill cover most beginner projects.
  2. You can never have too many. Bar clamps handle wide glue-ups; quick-grip clamps are fast for smaller work.
  3. Standard wood glue suits indoor projects. Water-resistant glue suits outdoor work and cutting boards.
  4. Oils are easy to apply and repair. Polyurethane and varnish protect tabletops and floors better.
  5. Eye and hearing protection and dust collection matter from the first project. Lay oily rags flat to dry to prevent fires.

Read the full guides

Answers

CMT 81131 Contractor Straight Bit, 3/4-Inch: common questions

Is the CMT 81131 Contractor Straight Bit, 3/4-Inch worth buying?

Yes, for the right buyer. The CMT 81131 Contractor Straight Bit, 3/4-Inch ranks #6 in our Best Straight Router Bits 2026 list (best large diameter). Its biggest strength: 3/4-inch diameter is the correct size for 3/4-inch plywood dado joints and shelf dadoes. The main caveat: large diameter requires full-size router with sufficient horsepower.

What are the downsides of the CMT 81131 Contractor Straight Bit, 3/4-Inch?

The main trade-offs owners and reviewers point to: large diameter requires full-size router with sufficient horsepower; anti-kickback limits maximum feed rate slightly.

What are the key features of the CMT 81131 Contractor Straight Bit, 3/4-Inch?

3/4-inch diameter, Micro-grain carbide, Anti-kickback body and 1/2-inch shank.

What are the best alternatives to the CMT 81131 Contractor Straight Bit, 3/4-Inch?

Worth comparing: Freud 12-128 1/2-Inch Straight Bit, Eclipse Grind, YONICO 14522q Router Bits Set Straight, 5 Bit and Bosch 85242MC 1/2 in. x 1-1/2 in. Carbide-Tipped Straight Router Bit. Each ranks near it in our research for a slightly different buyer.

Where can I buy the CMT 81131 Contractor Straight Bit, 3/4-Inch?

It's sold on Amazon. Prices and stock change often, so check the current listing before you buy, our link takes you straight to it.

More woodworking shortlists

More like this

Other woodworking we recommend

All woodworking

Browse all research