Quick Change Carbide Tipped Hole Cutter 2-1/8" (54.0 mm). Cuts stainless steel quickly and easily. Quick Change arbor allows you to change cutter heads with a simple push and a turn. Use the same arbor for different size cutting heads. Removable cutter heads available in sizes from 5/8" through 3". Flange stop prevents over-drilling. Ejector spring on all sizes above 3/4" 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. Minimum chuck size of 3/8".