Features 1、Quick Cutting: Internal, middle and external 3 blade design ensures easy hole drilling with high efficiency. 2、Reliable Work: Smooth chip removal will prevent jamming and breaking, will angle design reduces friction. 3、Fit for Metal: Suitable for cutting thick iron plate and other material, this hole drill bit is very useful. 4、Good Material: Adopting high speed steel material, not easy to deform and has excellent durability as well. 5、Simple Using: With a storage box, a hex wrench and a spring, the carrying is as easy as the installation. Specification Item Type: Hole Saw Material: High Speed Steel Cutting Diameter: Approx. 16mm / 0.63in Package List 1 x Hole Saw 1 x Hex Wrench 1 x Storage Box 1 x Spring