Precision Twist Drill Jobber Length Drill Bit, General Purpose, Series: L10, Imperial, 5/16 in Drill - Fraction, 0.3125 in Drill - Decimal Inch, 4-1/2 in Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 3-3/16 in Flute Length, 5/16 in Shank, Straight Shank, 118 deg Point, Conventional/Standard Point, Left Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Bright, Applicable Materials: Magnetic Soft Steel, Structural Steel/Case Carburizing Steel, Plain Carbon Steel, Alloy steel/Hardened and Tempered Steel, Free Machining Stainless Steel, Austenitic, Ferritic + Austenitic, Martensitic, Lamellar Graphite, Nodular Graphite/Malleable Cast Iron, Titanium Unalloyed/Alloyed ,Nickel Unalloyed/Alloyed, Brass, Bronze, High Strength Bronze, Thermoplastics, Thermosetting Plastics, Reinforced Plastic Materials and Cermets