Kryptonite 1090 Evolution Series 4 Chain Lock Higher Degree of Security Whether you're leaving your bike unattended for an hour or a few minutes, you should always put a lock on it. It only takes seconds for your bike to walk away and a lock will help to deter thieves. The Kryptonite Evolution series offers a higher degree of security in a chain lock for all-day lockup in metro areas. Fabric-covered manganese chains provide flexibility for locking to a variety of secure bases providing options when u-locks can't be used. This lock features a 35. 5" chain length, three stainless steel keys, a weather-resistant nylon sleeve that prevents scratches to painted finishes, and a security rating of 8 out of 10. Features10mm six-sided chain links made from 3T manganese steel Includes three stainless steel keys - two standard "I" keys and one LED lighted key Weather-resistant nylon sleeve prevents scratches to painted finishes Specifications Cable Length35. 5" (90cm)Cable Diameter10mm Six-Sided Chain Links Lock Style Keyed, Includes 3 Keys Security Rating8 out of 10Weight6. 1 lbs | Kryptonite | 1090 Evolution Series 4 Chain Lock Chain Lock | Nylon