2Pcs 12mm High Speed Steel Twist Drill Bit with Hex Shank 150mm Length 22mmx25mm little or no chipping

little or no chipping

Notched impact strength: (KJ/m2) > 5

5 x 76mm/ 4

3" Male/Female Thread Length 15mm / 0

2Pcs 12mm High Speed Steel Twist Drill Bit with Hex Shank 150mm Length 22mmx25mm little or no chippingDescription: 1. Made of high speed steel with dual coating of gold titanium and black nitride for better lubrication, smoother drilling. Increase the hardness of the drill, with good wear resistance and durability. 2. Can drill with less force and good radial stability. Easier chip evacuation, better heat dissipation and increased drill durability. 3. Suitable for drilling holes in alloy steel, wood, nonferrous metal, cast iron and hard plastics. 4.