Champion Cutting Tool Proline SDS PLUS Hammer Bit: CM95B-1/4X4X6 (25 piece bulk pack) Proline SDS Plus Hammer Bits drill concrete and other hard masonry materials quickly and accurately Vacuum brazed carbide and heat treated body increase tool life Features reinforced flutes and chisel shaped carbide tip for faster drilling and better dust extraction SDS-Plus hammer bits are for use in SDS-Plus rotary hammers Applications include drilling through concrete & stone, masonry, grout filled block, hollow block, cement board, and granite