Champion CT3-1-1/8 Carbide Tipped 1-1/8-Inch Hole Cutter-1/8-Inch Sheet Metal Special Tungsten Carbide Teeth for excellent wear and heat resistance One Piece Construction with Removeable Ejector Spring, Replaceable Pilot Pin and a Safety Collar Stop Maximum cutting depth of 1/8" with 1/4" Hex Shank for use in quick-change adaptors Cuts stainless steel, sheet metal, tough alloys and tubing Applications include: Junction/Switch Boxes, Metal Studs, Electrical Appliances, Lighting Fixtures, Auto and Truck Body Repair