HSS Aircraft Extension Extra Long Drill Bits 12 Inch for Metal Ss Aluminium Drilling

12 Inch HSS Aircraft Extension Extra Long Drill Bit for Metal Stainless Steel Aluminium Drilling  Discription of Aircraft Extension HSS drill bits:These 12" long drills are designed for drilling holes in hard, tough materials such as stainless steel, titanium and other high strength alloys. The special P3 split point and wear resistant surface treatment on these cobalt aircraft style drills will provide long life in portable applications. DIN1869 HSS Drill Bits Features:1. Material details:DESCRIPTION OF HSSCWMoCrVCoSiMnPS %%%%%%%%%%W2MoCr4V(4241)0.95-1.051.7-2.40.8-1.23.8-4.40.8-1.2 1.0-1.40.2-0.4