Champion CT7P-SET-4 Carbide Tipped Hole Cutter General Maintenance Set, 5-Piece Special Tungsten Carbide Teeth with One Piece Construction Removable Ejector Spring, Replaceable Pilot Pin and comes with Safety Collar Stop Maximum cutting depth of 1-Inch and can cut thick steel plate and pipe, ductile, iron, aluminum, copper, cast iron, stainless steel, FRP(fiberglass) hardboard and plastics (PVC and Conduit) Contents includes: 5/8-Inch, 3/4-Inch, 7/8-Inch, 1-Inch, 1-1/8-Inch, in plastic box