A professional industrial quality set of EIGHT impact star socket bits with 1/4″ drive. Manufactured by US.PRO Tools (formerly known as Bergen Tools), one of the more respected hand tool manufacturers on the market. For use with Torx® products. Forged from hardened Chrome Vanadium Steel (CR-V) for increased durability and longevity. Black Phosphate finish for corrosion resistance. Sizes are as follows: 1/4″ Drive (37mm long): T6, T8, T9, T10, T15, T20, T25, T27 and T30. 3/8″ Drive (48mm long): T40, T45, T47, T50 and T55. 1/2″ Drive (55mm long): T60 and T70. Each socket has the size etched on the side for easy identification. Supplied in a handy plastic tray for neat storage and easy transportation.