Milwaukee 7 Piece Carbide Cutter Plate Kit (49-22-8310)About This Product For materials up to 1 2 in. these carbide tipped steel plate cutters produce fine, burr free holes in a variety of materials. They are ideal for stainless steel, structural steel studs and electrical boxes. They can also improve your production in cast iron, brass, aluminum and other thin non ferrous metals. The carbide tips stay sharper longer than high speed steel or bi metal cutters giving these cutters longer life. Lubrication