The Deep Cut Bi-Metal Hole saws combine the aggressive tooth form from our previous Dual Pitch Hole Saws, with the new extra cobalt HSS teeth to provide enhanced heat and wear resistance. Featuring a 10mm increase in hole saw depth and aggressive material penetration and kerf clearance, it is the complete multi-purpose hole saw to penetrate deep into metals, wood, plastic, plaster and other materials. Aggressive material penetration and kerf clearance. Ideal for solid materials or tubes of a wall thickness greater than 3mm. 51mm hole saw depth improves cutting performance on tubes, particularly where there is a need to cut through both sides of the tube. New tooth material for enhanced heat and wear resistance and greater product life. 51mm (2”) hole saw depth – requires arbors with an extended length pilot drill . Reduced vibration and smooth cutting action for excellent ergonomics, reducing user fatigueTeeth per Inch (25mm): 4-6Teeth Type: HSSCountry of Origin: CN Specifications Pieces in Kit: 16 Cutting Depth metric: 51mm Cutting Depth imperial: 2" Kit Contents metric: Deep cut hole saw sizes 20, 22, 25, 29, 32, 35, 38, 44, 51, 57, 64, 68, & 76 ; Arbors A1E & A2E; Ejector spring A7mm Kit Contents Imperial: Deep cut hole saw sizes 20 25/32, 7/8, 1, 1,1/8, 1,1/4, 1,3/8, 1,1/2, 1,3/4, 2, 2,1/4, 2,1/2, 2,11/16, & 76 3, ; Arbors A1E & A2E; Ejector spring A7"