Precision Twist Drill Jobber Length Drill Bit, General Purpose Heavy Duty, Series: QC21GM, Metric/Imperial, 12.5 mm Drill - Metric, 0.4921 in Drill - Decimal Inch, 151 mm Overall Length, 4XD Cutting Depth, 2 Flutes, Wide Land Parabolic Flute, 101 mm Flute Length, 12.5 mm Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, TiN, Gold, Applicable Materials: Alloy Steel, Aluminum, Brass, Bronze, Copper, Ferritic+Austenitic, Free Machining Stainless Steel, Hardened/Tempered Steel, Lamellar Graphite, Magnesium, Magnetic Soft Steel, Plain Carbon Steel and Structural Steel/Case Carburizing Steel