DETROIT SDS-Plus Hammer Drill Bits are a trade quality drilling solution at an economical price point. They feature a robust 4-cutter geometry which not only increases life but also handles drilling of reinforced concrete. With their industry standard SDS-Plus shank, they are suitable for use with most Rotary Hammers (with SDS-Plus Tool Holders). DETROIT 24.0 x 450mm 4-Cutter SDS-Plus TCT Hammer Drill Bit