Bosch 5/16" x 4-1/2" Fractional Jobber Length Black Oxide Drill Bits (6 pk)

Model BL4147-BNDL

Features

• The speed helix design penetrates 3X faster than standard bits. The benefits include 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 and offer reduced friction between bit and workpiece
• 135° split point starts on contact with no walking or skating and no center punch is required

Includes

• 5/16" x 4-1/2" Fractional Jobber Length Black Oxide Drill Bits (6 pk) - BL4147

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