Specification:Cutting Edge Diameter : 8mm / 0.31";13mm / 0.51"Shank Diameter : 8mm / 0.31"; 10mm / 0.39"Cutting Edge Length: 75mm / 2.95";56mm / 2.2"Shank Length : 40mm / 1.57";55mm / 2.17"Total Length : 115mm / 0.59";150mm / 6.0"Material: High Speed Steel 4341Finish: Black & Gold Oxide FinishShank Type: Round ShankType: Hot Rolling,Milling ProcessPackage:1 x 8mm Reduced Shank Twist Drill Bits1 x 13mm Reduced Shank Twist Drill BitsDescription:1. High-speed steel straight shank drill bits are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.2. Reduced shank drills expand the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes.3. Premium gold titanium and black nitride dual coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant than the regular black surface.4. Tri-flat on the shank of drills are constructed for tighter chucking maximizing security for precise holes.5. For use in a wide range of stainless steel, aluminum alloy, iron, copper, brass and metal materials. Perfect tool for maintenance departments, machine shops, and other industries.
