This range of aircraft extension-length drills with straight shanks are manufactured from cobalt based HSS-E with a bronze oxide surface finish for hardy wear resistance. The design features a 135 heavy duty split point angle for a stronger chisel that guarantees an accurate centered drill as well as a long-lasting essential in your tool box. Features and Benefits Standard Spiral Flute Design for general purpose drilling Right Hand Rotation Bronze oxide surface treatment for increased wear resistance and hardness High Speed Cobalt Steel material providing strength when drilling Typical Applications Designed to drill in steel, stainless steel, cast iron and super-alloy without pecking Standards NAS907 Type J