HSS Aircraft Extention Extra Long Drill Bits 12 Inch Length Drilling Deep Holes..

HSS Aircraft Extention Extra Long Drill Bits 12 Inch Length Drilling Deep Holes..

● HSS High Speed Steel, best Material for improving performance and drilling life when cutting and drilling harder metals, such as Stainless steel, or other hard steel
● The Bright Finished strongthen the surface by Oxiding treatment on the Cobalt Steel, to ensure the long drilling life and better drilling performance
● The 135 Deg. Split Point to ensure the best positioning and better drilling performance
● Round Shank Allow use with a wide variety of tool holding systems
● 12" Overall length to ensure the best deep hole drilling in hard steel and matels.