A top quality heavy duty et of EIGHT impact adaptors for professional or occasional use. Manufactured from Chrome Vanadium Steel (CR-V) for longevity and durability and helps resist abrasion, oxidation and corrosion. Each has a spring ball socket retention fitting. Sizes are as follows: 1 x 1/2″F x 3/4″M 1 x 1/2″F to 3/8″M 2 x 3/8″F to 1/2″M 2 x 3/8″F to 1/4″M 2 x 1/4″F to 3/8″M All sockets ate laser etched on the side for easy identification. Black phosphate finish for protection against corrosion. Supplied on a handy metal rail to keep the sockets conveniently grouped for neat storage and easy transportation.