MARXBORE Jobber Length Drill Bit, Heavy Duty, Series: 384, Imperial, 1/2 in Drill - Fraction, 0.5 in Drill - Decimal Inch, 6 in Overall Length, 4-1/2 in Cutting Depth, Standard Flute, 4-1/2 in Flute Length, 1/2 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, HSS Cutting Edge, No Through Coolant, HSS, Black/Gold Oxide, Applicable Materials: Alloy Steel, Aluminum Alloy, Cast Iron, Composites, Copper Alloy, Low Carbon Steel, Magnesium Alloy, Medium Carbon Steel, Plastic, Stainless Steel, Titanium Alloy, Tool and Die Steel