OnGuard chain locks offer bicycle owners extra length for locking versatility plus the highest level of security for use in high crime areas. Massive, titanium reinforced hexagonal links render hacksaws and bolt cutters virtually useless while tight inside link dimensions make prying impossible. Embroidered nylon chain covers won’t crack or peel. Velcro tabs keep cover in place to help protect paint and finishes.Features: Hexagonal and square links present more hardened surfaces than round links making sawing and cutting virtually impossible. Titanium surface hardening vastly increase cut and saw resistance. Embroidered nylon chain covers won’t crack or peel for long lasting beauty. Velcro tabs keep cover in place to help protect paint and finishes. Comes with 3 laser cut keys.