McJ Tools 19mm HSS M2 Drill Bit Hole Saw for Metal, Steel, Iron, Alloy, Ideal for Electricians, Plumbers, DIYs, Metal ProfessionalsMaterial: High Speed Steel Style: Box Cut a wide range of materials such as steel, cast iron, sheet metal and copper Work well with abrasive materials like high density resin and metal plates Comes in a rugged plastic box with extra pilot bit, set screw and allen wrench. By using liquid coolant, it can cut over 100 holes in steel plate (~<1 4" in thickness) Item Number: McJM2HSS 19mm Dimensions: 3. 27 x 1. 38 x 1. 34 inches Weight: 0. 24 lb In 1980s,