1/2″ Long Ribe® & XZN/Triple Square Bit Socket Set TT1 15 Pieces 100mm length for easier access in recesses Chrome vanadium satin finish sockets Designed and manufactured to DIN and ISO standards Organised in a tool tray module size 1 (TT1) Set containing 15 1/2″ drive Ribe and XZN bit sockets. Satin Finish. Ribe bit sockets 100mm 1/2″ drive No 4, 5, 6, 8, 10, 11, 12, 13. XZN bit sockets 100mm 1/2? drive No 5, 6, 8, 10, 12, 14, 16.