HSS Twist Drill 7pcs-- (1.5, 2, 3, 4, 5, 5.5, 6mm)
![](http://img.hisupplier.com/var/userImages/2011-09%2F04%2F114124578812.jpg)
HSS drill bits made by roll forged black fnish
roll forged bright finish
roll forged titanium finish
fully ground bright finish
fully ground black
fully ground titanium finish
are workable and acceptable