Impact Pro Black Oxide Drill Bits. Made From Premium M2 Steel To Withstand Heat And Wear Under Rigorous Drilling Applications. One-Piece, Fully Ground Construction Lasts 6 Times Longer Than Two-Piece Constructed Bits. 1/4" Quick-Change Shank Fits All Quick-Change Adapters And Cordless Impact Tools. Features. Impact Pro 0.125-Inch Black Oxide Drill Bit. Specifications: Dimension 1 X 4 X 7 Inches. Hub 28. Weight: 0.03 Lbs