The hole allows for the clamp to be fixed to a workbench

one for high speed and one for high torque

Grind: ATB

Materials: Wood

The kit includes 1 inch

Amana 47150 No-File Trim Router Bit 577550 The hole allows for theTrimming Router Bits: No File Trim Router Bits, Carbide Tipped: 0. 059 Rad x 1 2" Dia x 3 8" x 1 4" Shank Eliminate the time consuming hand filing that normally follows each trimming cut on a laminate job. Our No File bit "breaks" the sharp edge as it trims the laminate flush. When used properly, the resulting edge is smooth and has a slight radius. Standard Equipment: 47150 No File Trim Router Bit Specifications: Radius (R): 0. 059" (1. 5mm) Diameter