5/16 x 4" Masonry Drill Bit
- Tungsten Carbide Reinforced Head, Black Oxide Finish
- Round shank designed for rotary and percussion hammer drilling.
- Drills through block, brick, stone, concrete & marble.
- Induction-hardened body for straightness & strength.
- Precision-ground tips are carbide grade BC20.
- Engineered with wide flutes for fast dust removal.
- Shank 1/4"