Professional HEAVY DUTY tool set These bits will allow you to open those Torx/Star male fasteners. These are common on European made cars such as BMW. Mercedes, Volvo etc. Features: Drop Forged, Chrome Vanadium Steel. Heat Treated. Contents: 5 pc 1/4" Drive Sockets E4, E5, E6, E7, E8 6 pc 3/8" Drive Sockets E10, E12, E14, E16, E18, E20 Matched clip-on Storage Rail.