Built for use on masonry and rebar. Bits feature 2-cutter geometry for fast drilling and debris removal. Reinforced flute design increases impact resistance and transfers energy directly to the bit tip. Rebar chamfers withstand impact fromrebar and hard aggregate and reduce carbide chipping. Centering tip improves accuracy. SDS shank reduces slippage. Includes 1 each: 1/2" x 6", 1/4" x 6", 3/16" x 4", 3/8" x 6", 5/16" x 6".