Triumph® Jobber Length Drill Bit, General Purpose, Series: T3B, Imperial, L Drill - Letter, 0.29 in Drill - Decimal Inch, 4-1/4 in Overall Length, 2-15/16 in Cutting Depth, 2-15/16 in Flute Length, 118 deg Point, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Aluminum/Aluminum Alloys, Wood, Plastic, Soft and Medium Bronze