31/64" HSS Drill Bit Long Series Carded 2500-31/64S by Bordo Magnetic Bender The blade is made of

The blade is made of tool steel hardened to Rc60-62

6mm for maximum productivity

Temperature Resistance: Up to 200°c short duration (see more info below)

Profile: Rectangular profile with ribs

31/64" HSS Drill Bit Long Series Carded 2500-31/64S by Bordo Magnetic Bender The blade is made ofBLACK FINISH (also called blue finish) A black finish is achieved 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 result is increased tool life. Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation. Specifications: