NAS 907 type B standards, used in the aerospace industry Steam tempering (black oxide) finish, for improving lubricity, and resisting corrosion, chipping, or flaking Jobber-length, for a wide range of applications 135-degree split-point angles are self-centering, to reduce walking, are good for hard material, and to reduce pressure on cutting edges High-speed steel (HSS), for use on a wide variety of materials