Precision Twist Drill Jobber Length Drill Bit, General Purpose Standard Length, Series: D33F, Imperial, 5/16 in Drill - Fraction, 0.3125 in Drill - Decimal Inch, 3-3/4 in Overall Length, 3XD Cutting Depth, 2 Flutes, Spiral Flute, 2-3/8 in Flute Length, 5/16 in Shank, Straight Shank, 118 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, Carbide Cutting Edge, No Through Coolant, Carbide, Bright, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy Steel/Hardened and Tempered Steel, Lamellar Graphite, Nodular Graphite/Malleable Cast Iron, Brass, Bronze, Thermoplastics, Thermosetting Plastics, Abrasive and Non-Ferrous Materials