M-Wave ring lock with plug-in chain This ring lock, in combination with the plug-in chain, provides maximum security for your bicycle. The plug-in chain has a hardened steel interior. You can easily open and close the ring lock with the key. The lock has an anti-drill plate in the cylinder, which prevents the lock from being drilled open. The shackle and lock housing are made of hardened steel. Ring lock specifications: Plug-in option: yes Opening width: 56 mm Weight: 400 grams Color: black Internal material: steel Casing material: plastic Mounting: on frame Plug-in chain specifications: Weight: 580 grams Length: 150 cm Diameter: 5.5 mm Color: black Internal material: steel Casing material: nylon The ring lock with plug-in chain is supplied without mounting hardware. Contents: 1 Ring lock 2 Keys 1 Plug-in chain