Drill America DWDCO7-8 7/8" Reduced Shank Cobalt Drill Bit

Cobalt steel bit with reduced shank

This 7/8 inch cobalt steel drill bit features a reduced shank that fits standard half-inch chucks. The heavy-duty notched point is designed to start cleanly and resist walking on hard metals. It suits machinists and maintenance technicians who need a single large-diameter bit for tough alloys.

Sustained drilling in hard materials

Cobalt alloy retains hardness at the elevated temperatures produced during extended cuts in stainless steel or high-strength alloys. The 3 inch flute length clears chips efficiently to reduce heat buildup. Builders who need a full set of step sizes or a bit for non-ferrous sheet metal should choose a different tool.