- Alloy four-blade chisel, sharp cutter head, sturdy and durable
- Spiral body design increases chip evacuation efficiency and increases open hole speed
- Carbide tipped cross head drill bits, features precision cutting tips for quick, smooth cut and finish
- Suitable for concrete, cement wall,brick wall punched,clinker,natural or artificial stone
- Applicable to electric hammer machines, please confirm whether the size is suitable for the machine before purchase