#40 Pilot x 3/8" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink 3660220 2-3/4" (75mm)

2-3/4" (75mm)

including 6 extra-deep pockets for long screwdrivers

- 10 degree positive tooth angle

which means it can be converted to internal balance

Precision designed auger flute - Assists soil penetration

#40 Pilot x 3/8" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink 3660220 2-3/4" (75mm)Countersink cutters may be used in all popular adjustable or micro stop countersinking units utilizing a threaded shank drive. Made from the finest high speed tool steel. Precision ground to exacting tolerances and form relieved to insure concentricity of countersink angle Pilot diameter; #40 Body diameter: 3 8" Shank thread: 1 4 28 Included angle: 100 degrees