Chicago-Latrobe - Jobber Length Drill, Heavy Duty, Series: 550-TA, Imperial, K Drill - Letter, 0.281 in Drill - Decimal Inch, 4-1/4 in Overall Length, 2-15/16 in Depth of Cut, 2 Flute, Right Hand Spiral Flute, 2-15/16 in Flute Length, 0.281 in Diameter 1 x 1.31 L-Shank, 25 in L-Shank, Straight Shank, 135 Degree Point, Split Point, Right Hand Cutting Direction, M42 HSS-Co 8% Cutting Edge, TiAlN Coating, Applicable Materials: Alloy Steel, Stainless Steel, Titanium and Tool Steel