DeWalt DW5205 Hammer Percussion Drill Bit Set, 5 PieceHighlights: 5 Piece set Three flats on the shank eliminate bit slippage Includes : 3 16", 1 4", 5 16", 3 8", and 1 4" bits Two cutter carbide tip maximizes carbide surface contact for longer bit life Use to power through masonry, concrete, rock, and more with DEWALT Hammer Drill Bits WARNING: Some Dust Created By Power Sanding Sawing Grinding Drilling And Other Construction Activities Contains Chemicals Known To The State Of California To Cause Cancer