Greenlee® Kwik Stepper Multi Hole Step Bit Kit (#1, #3, #8)Minimum Drill Size: 1/2 InchMaterial: SteelFinish: Steam Oxide (Bit)Cut Materials: Aluminum, Brass, Copper, Mild Steel, Plastic, WoodKit Contents:34401 1/2 Inch Multi-Hole Step Bit34403 7/8 Inch Multi-Hole Step Bit36413 1-1/8 Inch Multi-Hole Step Bit35936 Plastic Case SKU: GRNL.35884 Brand: GREENLEE Country of Manufacture: United States Supplier Part Number: GRNL35884 Unit of Measure: PCS