Product Information:Greenlee 645001 Pilot Drill Bit for 5/8" 21/4" is for use with Kwik Change Hole Cutter, small arbor. It cuts stainless steel quickly and easily. The Kwik Change arbor allows you to change cutter heads with a simple push and a turn. Featuring the ability to use the same arbor for different size cutting heads, and flange stop prevents overdrilling. The Ejector Spring on all sizes above 3/4" makes removal of slug easier. Replaceable, cobaltsteel pilot drill with splitpoint tip to prevent walking. Precision carbide teeth for optimum performance and durability. Minimum chuck size of 3/8".Greenlee Tools Pilot Drill Bit is in stock and ready to ship today Features:#149; Cuts stainless steel quickly and easily#149; Kwik Change arbor allows you to change cutter heads with a simple push and a turn#149; Use the same arbor for different size cutting heads#149; Flange stop prevents overdrilling#149; Replaceable, cobaltsteel pilot drill with splitpoint tip to prevent walking Specifications:#149; Model Number: 645001#149; Material Number: 50057618#149; Minimum Chuck Size: 3/8"