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an extremely high performance coating recommended for high tensile materials including stainless steel
Bronze Finish (gold oxide) surface treatment
In these situations it will produce thicker chips minimising work hardening of the cavity
Although these drill bits are not recommended for drilling vitrified porcelain
Manufactured from premium quality high speed steel with double fluted ground cutting edges for long service life
8.5mm BRT HSS Delta Point Jobber Drill an extremely high performance coating8. 5mm Delta Point Bright Finish HSS Twist Drill Bordo Metric Delta Point M8. 5 HSS Twist Drills. DIN338 Delta Point drills have a multi faceted cutting tip. Rather than try and modify existing point types, or tweak the grind angles, Delta Point tip design required a revolutionary re think of drill tip function. The overall length of the cutting edge significantly exceeds that of conventional drills. This means more edge doing the cutting and the