Irwin Industrial Tools 10220CB Unibit 1/16-Inch Hole Enlarging 8-Steps Cobalt Step Drill Bit
585-10220CB Features: -6X longer life.-3-Flatted shank.-Speedpoint? tip.-Laser marked sizes.-Cutting Diam: 9/16 in [Min], 1 in [Max].-Cutting Edge Material: M35 Cobalt HSS.-Measurement Type: Fractional.-No. of Steps: 8. Dimensions: -Material Thickness: 1/16 gauge [Max].