Uxcell 36Pcs Straight Shank Twist Drill Bits 4.2Mm Tin Coated High Speed Steel 4341

Specification:Cutting Edge Diameter : 4.2mm / 0.17"Shank Diameter : 4.2mm / 0.17"Cutting Edge Length: 37mm / 1.46"Total Length : 75mm / 2.95"Split Point: 135 DegreeCutting Direction: Right HandMaterial: High Speed Steel 4341Finish: Gold Titanium & Black Nitride CoatedShank Type: Round ShankType: Hot RollingPackage: 36 Pcs x Straight 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. Sharp spiral flutes provide neat and smooth cuts. High cutting edge strength, fast cutting speed. Spiral groove facilitates the export of metal chip, saving time and effort in operation. Common flute and overall length for minimal adjustment during tool changes.3. 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. 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.