Metric HSS Black Long Series Drill
Save 49%
Original price
$14.78
Original price
$12.04
-
Original price
$99.58
Original price
$14.78
Current price
$7.81
$6.36
-
$50.99
Current price
$7.81
- ANSI B94-11
- 118º chisel point with 30º helix.
- Chisel point is suitable for general purpose drilling.
- Black Finish Twist Drills (also called blue finish) achieve 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 result is increased tool life.
- Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.