Champion CT5P-ELECTRICAL-1 Carbide Tipped Hole Cutter Master Electrician Set, 10-Piece Removable Ejector Spring, Replaceable Pilot Pin and comes with Safety Collar Stop with a maximum cutting depth of 3/16-Inch Cuts steel plate, iron, aluminum, copper, cast iron, stainless steel, FRP(fiberglass) and plastics (PVC and Conduit) Applications include: Junction/Switch Boxes, Metal Studs, Electrical Appliances, Lighting Fixtures, Auto and Truck Body Repair and cast iron pipes Contents includes: 5/8-Inch, 3/4-Inch, 7/8-Inch, 1-Inch, 1-1/8-Inch, 1-1/4-Inch, 1-3/8-Inch, 1-1/2-Inch, 1-3/4-Inch, 2-Inch, 2-1/2-Inch, 3-Inch, 3-5/8-Inch, 4-1/8-Inch, 4-1/2-Inch in plastic case