ThunderBit® Jobber Length Drill Bit, Heavy Duty, Series: T2HD, Imperial, #6 Drill - Wire, 0.204 in Drill - Decimal Inch, 3-3/4 in Overall Length, 2-1/2 in Cutting Depth, 2-1/2 in Flute Length, 135 deg Point, Split Point, HSS Cutting Edge, HSS, Black/Bronze Oxide, Applicable Materials: Cast Iron, Low and Medium Carbon Steel, High Alloy Steel, Stainless Steel, PH Steel, Tough, Medium and High Tensile Strength Alloys