Plunge-cutting straight with a shank-mounted ball-bearing pilot. Useful for template/pattern routing or parts, joints, internal cuts and can be used in handheld and table-mounted routers. The template is attached to the workpiece and the pilot bearing rides along its edge As the cutting edges rout the workpiece, forming an exact Duplicate of the template, #57176, diameter (D): 7/8, cutting Height (B): 1-9/64, shank (D): 1/2, overall length (L): 3-15/16, replacement collar: 47739, replacement bearing: 47793, flutes: 2, 57176 Solid Carbide spiral pattern/plunge compression 7/8 dia x 1-9/64 x 1/2 inch Shank