● Woodworking · Review

CMT 81131 Contractor Straight Bit, 3/4-Inch

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

✎ PickHonest Research Desk▦ Updated October 15, 2026◷ 3 min read

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CMT 81131 Contractor Straight Bit, 3/4-Inch
Best Large Diameter

CMT 81131 Contractor Straight Bit, 3/4-Inch

CMT

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

  • 3/4-inch diameter
  • Micro-gra in carbide
  • Anti-kickback body
  • 1/2-inch shank

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 w here more material is engaged
  • 1/2-inch shank for the stability required at 3/4-inch cutting diameter
  • CMT micro-gra in carbide maintains sharpness better than standard carbide

Cons

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