IRWIN 10239CB Unibit 2-Steps Cobalt Alloy Steel Step Drill Bit for 1/2-Inch and 3/4-Inch KO, Black

Drill Doctor DDSB Spade and Twist Drill Bit Sharpener

Irwin 49998 6 Piece 1/4-Inch to 1-Inch Solid Center Auger Bit Assortment

Irwin Industrial Tools 3046005 1-1/8-Inch 3-Cutter Self Feed Drill Bit

This Old House

Irwin Industrial Tools 10232CB Unibit 1/16-Inch 6-Steps Cobalt Step Drill Bit

Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz

IRWIN Unibit High-Speed Steel Fractional Self-Starting Step-Drill #5, 10235

Greenlee 37156 Hole Saw Arbor, 7/16-Inch Hex Shank for 1-1/4-Inch to 6-Inch Hole Saws