Kempston 318012 Canoe Joint Bead Bit 1/4-Inch Shank, 1-1/2-Inch Cutting Diameter, 1/4-Inch Cutting Length, 1/8-Inch Radius Prefessional Grade C3 or C4 Premium Carbide Non-Stick Coating Anti-Kickback Design C.N.C. Precision Ground