17/64" HSS Drill Bit Long Series Carded 2500-17/64S by Bordo Miniature England Having a double bevel

England Having a double bevel HSS ring

8mm Set Size Range Max 15/16

Ideal for removing formwork seams and imperfections in concrete and stone

9/16" 5/8"

These are available in a range of sizes to compliment your work

17/64" HSS Drill Bit Long Series Carded 2500-17/64S by Bordo Miniature England Having a double bevelBLACK 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: