DeWalt professional grade carbide toothed hole saws for metal. Lasts 10x longer than bi-metal hole saws. The carbide teeth cut accurately and cleanly into all types of metal and the single piece design ensures increased stability and durability. Features & Benefits • For cutting stainless steel, ferrous and non-ferrous metals • Carbide Teeth provides smooth, clean cuts and 10x longer life • Anti slip shank prevents rotation in the chuck and ensures optimum force transmission Specifications • Diameter: 51mm • Pack Quantity: 1