This bike lock has a practical automatic closing function. This makes locking quick and easy, without the need for a key. The Chain Lock Steel-O-Chain 4804K is the perfect choice when time is of the essence. The automatic cylinder allows the bike to be locked without a key. Simply open the lock and press the locking bolt into the lock body job done. The bike lock is ideal for securing low-cost bikes and childrens bikes, in areas with a low risk of theft. Technologies: 4 mm thick square chain with textile sleeve that prevents damage to paintwork,The chain is made of specially hardened steel,. Operation and Use: Basic protection at low theft risk,Recommended for securing low-range bicycles and childrens bikes,. Transport: Easy to transport around the seat post,For protected transportation we recommend, for example, the frame bags ST 2012 or ST 2200,.