The round shank is suitable for use with cordless power drills only Faithfull Diamond Ceramic Mini Holesaws are ideal for tough drilling situations. They cut holes fast and cleanly and are easy to start with no guide drill required The tough braze bonded diamond edge and durable alloy body give these tools an extremely long lifespan Diamond Ceramic Mini Holesaw 5mm Diamond ceramic mini hole saw 5mm, Weight: 0.01322773572 pounds, Manufacturer: Faithful