Features 1、The head of the hole saw is made of YG8 cemented carbide particles, which makes the cutting blades very incisive. 2、High accuracy and smooth cutting edge ensures high cutting efficiency as well as quick chip removal, very practical. 3、The black storage box will store all the tools in an orderly manner, which simplifies the carrying for daily working. 4、These hole saws have great impact resistance, and the threaded post is firmly installed and will not loosen in using. 5、The drill bit is mainly made of tungsten carbide material, the surface is galvanized, it is not easy to rust, very durable. Specification Item Type: Hole Saw Material: Tungsten Carbide Purpose: Tungsten Carbide Granular Hole Saw Colour: Black + Silver Tool Handle Type: Hex Cooling Type: External Cooling Cutting Diameter: Approx. 22mm / 0.9in, 28mm / 1.1in, 35mm / 1.4in, 44mm / 1.7in, 68mm / 2.7in, 73mm / 2.9in Package List 6 x How Saw 2 x Mandrel 1 x L Shape Wrench 1 x Black Storage Box