Feature:1. The main body is made of cemented carbide, which effectively extends the service life.2. This hole saw cutter can make holes in steel plates, iron plates, stainless steel plates, aluminum plates, calcium silicate plates, plastic plates, resin plates, and FRP plates.3. The cutting edge is incisive, the opening is neat and glossy without broken edges, and the cutting resistance is small.4. With front and rear inclination angle tooth shape design, low resistance and strong perforation ability.5. The carbide hole saw can be compatible with a variety of materials and work more efficiently.Specification:Item Type: Carbide Hole CutterMaterial: CarbidePurpose: To make holes in steel plate, iron plate, stainless steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP platePlate Cutting Thickness: Approx. 3mm / 0.1inTotal Length: Approx. 88mm / 3.5inInner Wall Thickness: Approx. 20mm / 0.8inShank Diameter: Approx. 9.8mm / 0.4inHole Diameter Specification: Approx. 16mm / 0.63in16.5mm / 0.65in17mm / 0.67in17.5mm / 0.69in18mm / 0.71in18.5mm / 0.73in19mm / 0.75in19.5mm / 0.77inPackage List:2 x Hole Saw2 x Spring2 x Hex WrenchNotice:Not suitable for electric drills and impact drills, as well as materials such as tiles, concrete, wall, and stones.