Mammoth Motorcycle Closed Shackle Lock and Chain 10mm x 1200mm The Mammoth motorcycle closed shackle lock and chain 10mm x 1200mm is the ultimate bike security! Designed for all securing needs, especially suited to secure a motorbike to permanent fixings such as ground anchors and lamp posts. Motorcycle Chain and Shackle Lock Features 10mm square section chain. 1.2M Chain length. Protective textile outer sleeve. 11mm hardened steel closed shackle lock. Included In The Box: 1x Motorcycle Chain and Shackle Lock 2x Keys