The Simson Chain Lock Mighty is a very strong chain lock. The chain has a length of 100 cm and can easily be carried by turning the chain around the seat post. The lock is ART-3 approved and therefore for any bike insurance to use as an approved lock. The powerful chain has 10 mm thick links made of hardened steel. The integrated lock ensures optimal ease of use to safely lock the bike. Specifications: Color: black, red Material chain: steel Material cover: nylon Hallmark: ART-3 Length: 100 cm Thickness of links 10 mm Lock: key Contents: 1 Chain lock 2 Keys