Starrett KDC10021 Deep Cut Bi-Metal Deluxe Electrician's Holesaw Kit, 12 PieceThe Starrett KDC10021 Deluxe Electrician's Holesaw Kit contains a selection of sizes to cover a variety of different jobs. Deep Cut Bi Metal Holesaws offer aggressive material penetration and kerf clearance. Improved tooth material for enhanced heat and wear resistance and greater product life. Ideal for solid materials or tubes with a wall thickness greater than 3mm. The 51mm cutting depth improves cutting performance on tubes, particularly where