A collectors item for special occasions. Theses ball end hex impact bits are designed for professionals who want to expedite their work with precision and efficiency. Made of high-grade Chrome Molybdenum alloy with black manganese phosphate finish, these are built to last throughout ones professional career, and maybe farther. The bit heads are carefully heat tempered to have Schrauben Schonenderes - more gentle on screw heads. to minimize stripping and wearing damages to bits and screws. A robust metal case is included for easy storage and transport.