• Bimetallic Hole Saw of different dimensions: 38mm / 70mm / 100mm / 155mm. • 10 mm shank, 75 mm diameter, 27 mm working depth. • 100% cemented carbide steel with central shaft. • Professional material: heat-treated carbon steel, oil and rust proof. • Spring design for chip removal and high drilling efficiency. • Hexagonal handle for a firm grip. • Easy to use with non-binding clean edge design. • Widely used in drywall, steel, aluminum, non-ferrous metals, copper, brass, wood, plastic, and PVC.