Multi-purpose Drill Bits, 5-pc. Set

Works ideally for cordless drills, corded drills and drill presses

Outlasts regular carbide tipped bits

Requires no center punch - eliminates walking

Resharpens on a high-quality silicon carbide grinding wheel

Uses standard coolants - turpentine, light oil, water

Flat bottom parabolic flute for faster waste removal

Special negative back grinding enables the tip to bore through materials with a filing action, not cutting