Precision Twist Drill Threaded Shank Drill, Long, Series: TS51, Imperial, 1/4 in Drill - Fraction, 0.25 in Drill - Decimal Inch, 2-1/8 in Overall Length, 1-1/8 in Cutting Depth, Spiral Flute, 1-1/8 in Flute Length, 1/4-28 Shank, Hex Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Oxide Treated, Dark Gray, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum Magnesium, Synthetic Materials and Hard Materials