7 mm thick square chain with a new functional, durable, and highly flexible Ivy synthetic fiber coating to protect against paint damage. The chain, the casing, and load-bearing parts of the locking mechanism are made from specially hardened steel. The coating offers very high protection against abrasion and does not absorb liquids, for example, water or oil. Equipped with a new CW10 cylinder, the CW10 is a wafer cylinder with 10 wafers, providing 17,000 different key variations.