The GERDA CONTRA LINE COMBO 900/6C bicycle lock features a five-digit code chain, ensuring security and ease of use. The Contra Combo 900/6C chain has 6 mm links, placed in a protective fabric sleeve. Made with 6 mm steel links and a length of 90 cm, it offers convenience in securely supporting your bike during commutes. The chain is coated with a fabric surface that protects the bike from scratches. The four-digit coded lock, set with a personal code, allows for quick and secure locking of the bike. The ease of use of the combination lock eliminates the need to carry a key.