Bosch BL4138

11/64" Fractional Jobber Length Black Oxide Drill Bits

Reduced friction between bit and workpiece
The speed helix design penetrates 3X faster than standard bits
Easier drilling, reduced heat, extended drill bit life and extended cordless battery life
Triple tempered black oxide coated bits last 50% longer than regular high speed steel
135-degree split point starts on contact with no walking or skating and no center punch is required