Abus, Locks, Chain adapter for PRO TECTIC / PRO SHIELD CHAIN (4960/5850/5650/5950), different kinds of attachments, length: 850 mm, 6 and 8 mm thick, square chain made of hardened steel, separate locking of the shackle is not necessary, opens up a lot of opportunities for locking the bicycle on to a fixed object, suitable for use with frame locks, about 803g