5/16" Pilot x 1/2" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink Brand_Weller Recommended for use with multiple-spark

Recommended for use with multiple-spark discharge and electronic ignition systems

For removal of damaged nuts

and lightweight all-aluminum castings

High Performance Racing Spec

5/16" Pilot x 1/2" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink Brand_Weller Recommended for use with multiple-sparkCountersink 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; 5 16" Body diameter: 1 2" Shank thread: 1 4 28 Included angle: 100 degrees