The Milwaukee SDS-Plus Bits with 1/4 inch Hex are designed specifically for Topcon screw applications. Built to take on brick， block and concrete Milwaukee SDS bits feature 2 cutter geometry for fast drilling and debris removal. The patented， reinforced flute design increases impact resistance and transfers energy directly to the bit tip. Patented rebar chamfers withstand impact from rebar and hard aggregate and reduce carbide chipping. To be used with drive sleeve available in the SDS Plus Topcon installation kit (48-20-7497). Tapcon is a registered trademark of Illinois tool works Inc.