Greenlee 660 Kwik Change Stainless Steel Hole Cutter Kit, 7-Piece Flange stop prevents over-drilling Ejector Spring on all sizes above 3/4-inch makes removal of slug easier Replaceable, cobalt-steel pilot drill with split-point tip to prevent walking Precision carbide teeth for optimum performance and durability Includes 5 cutter heads, arbor, hex key and case.Dimensions 7/8 inch, 1-1/8 inch, 1-3/8 inch, 1-3/4 inch and 2 inch cutter heads