CMT 811.001.11 3-Piece Plywood Groove Set by CMT is engineered specifically for routing tight-fitting grooves and dadoes in plywood panels. Unlike standard straight bits, each bit in this set is sized to match the true thickness of common plywood sheets - eliminating the gaps and sloppy joints that result from using bits sized to nominal dimensions. Whether you are cutting shelf dadoes, cabinet box joints, or furniture carcass joinery, this three-bit collection covers 1/4 in., 1/2 in., and 3/4 in. plywood with a single affordable set. All three bits share a 1/4 in. shank, making the set compatible with compact routers, full-size handheld routers, and router tables alike.

Key Features

• True-Thickness Plywood Sizing - each bit is dimensioned to match the actual thickness of plywood rather than its nominal label, so dadoes and grooves produce snug, gap-free joints without shimming or adjustment.
• Three Cutting Diameters in One Set - the 15/64 in. bit fits 1/4 in. plywood, the 31/64 in. bit fits 1/2 in. plywood, and the 23/32 in. bit fits 3/4 in. plywood, covering the three most common sheet goods thicknesses used in cabinetry and woodworking.
• Hardwood (HW) Carbide Cutting Material - the carbide-grade tooling material provides durability and edge retention when routing plywood, MDF, and composite panels that would dull ordinary steel quickly.
• 1/4 in. Shank - the standard 1/4 in. shank fits a wide range of routers and router tables, making this set accessible to hobbyists and professionals working with compact or trim routers as well as full-size machines.
• Right-Hand Rotation - designed for the standard right-hand rotation direction used by virtually all handheld routers and router table setups, so no special configuration is needed.
• 2-Flute (2-Tooth) Geometry - the two-tooth cutting configuration balances chip clearance and surface finish quality in plywood joinery cuts.
• Money-Saving Set Format - purchasing all three plywood-matched groove bits together delivers better value than buying individual bits, and ensures you always have the right cutter on hand for any sheet goods thickness.

Why This Product

• Eliminates Loose Plywood Joints - because each bit matches the true (not nominal) thickness of 1/4 in., 1/2 in., and 3/4 in. plywood, the dadoes and grooves it cuts accept panels with no slop, no gaps, and no need for filler strips or excessive glue.
• One Set Covers All Common Plywood Thicknesses - instead of searching for individual specialty bits for each panel size, this three-bit set handles the full range of standard cabinet and furniture plywood in a single purchase.
• Designed for Plywood-Specific Joinery - these bits are purpose-built for plywood groove and dado work, not repurposed general-purpose straight bits, meaning the cutting geometry and sizing are optimized for the application.
• Versatile 1/4 in. Shank Compatibility - the 1/4 in. shank fits compact trim routers, larger handheld routers, and router table setups, giving woodworkers flexibility across different tool setups without needing a second set.

Specifications

• Manufacturer Part Number: 811.001.11
• Brand: CMT Orange Tools
• Shank Diameter: 1/4 in.
• Cutting Diameters: 15/64 in., 31/64 in., 23/32 in.
• Number of Teeth: 2
• Cutting Material: HW (Hardwood Carbide)
• Rotation: Right-hand (RH)
• Number of Pieces: 3

Approved Applications

• Plywood groove and dado joinery
• Cabinet box construction
• Shelf dado routing
• Furniture carcass joinery
• Tight-fitting panel joints in plywood, including 1/4 in., 1/2 in., and 3/4 in. sheets

What's Included

• 1x Plywood Groove Bit - 15/64 in. cutting diameter, 1/4 in. shank
• 1x Plywood Groove Bit - 31/64 in. cutting diameter, 1/4 in. shank
• 1x Plywood Groove Bit - 23/32 in. cutting diameter, 1/4 in. shank