The Irwin Speedhammer SDS Max drill bits have been designed for easy & trouble free drilling of concrete, granite & similar very hard materials. The patented carbide tip head takes 80% of the workload, ensuring higher durability, speed & rebar performance. The 53° drilling head design means more aggressive cutting & faster dust removal for overall faster performance & the four-cutter tips for less vibration, faster drilling, rounder holes & better anchoring. The shank fits all SDS