SDS Hammer Drill Bits 1. Material: 40cr; 2.Apply to hammer drill ; 3.Length:160mm. 4. SDS plus SDS Hammer Drill Bits1. Material: 40cr,YG8C,2. Apply to Hammer drill.3. Speciations: 8*160mm.4. Superior quality bits designed fordrilling brick,block,masonry,concrete and granite.5. Grounds-forged for toughness,and spiral fluted for effective waste removal. Hammer Drill Bits--SDS Hammer Drill Bits