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TCT Tip thick heavy duty carbide alloy with high hardness, rust proof, sturdy and durable; With a spring prevent stucking on operation. Cutting dia: 22mm/0.86""Shank size: 10mm/0.39""Cutting depth: 30mm/1.18""Overall length: 90mm/3.54"" Package Contents: 2 x Carbide Hole Saw Cutter Drill Bit, 2 x Hex Wrench Application: Can be used on hand held drill, bench drills, magnetic drills, pneumatic drills and other rotating machines.Smooth cuts into materials including iron pipes, thick metals, stainless steel, high alloy steel, aluminum, plastic, FRP and PVC, etc. Suitable for stainless steel plates within 8mm and metal plates within 20mm.Widely used for home decoration work, e.g. drill holes on metal plate in the kitchen room, door structure and cable box.