Black Finish Jobber Drill Set Metric: 1.0 - 10.0 x 0.5mm Rises | 19pc Width 13 mm low and high steel alloys

low and high steel alloys

Ultra glide bearing

the hardness at high temperatures)

HSS Bright Finish Drills

Black Finish Jobber Drill Set Metric: 1.0 - 10.0 x 0.5mm Rises | 19pc Width 13 mm low and high steel alloysBlack Finish Jobber Drills (also called blue finish) acheive their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating. This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The 118 Split Point drills are self centering and ideal for use in materials such as mild steel and cast iron. Black Finish Jobber Drills Metric: 1. 0 10. 0 x