Hign-concerned Chemical:None Origin:Mainland China Motorcycle Helmet Lock Anti-Theft Fixed Lock Metal Multi-function Universal Bicycle Anti-theft Security Moto Accessories Specification: Product name:Motorcycle Helmet Lock Size: 7X5cm Weight: 70g Material: Alloy Describe: Electric bicycle helmet lock, anti-theft universal fixed multi-function lock, battery car motorcycle bicycle helmet lock; Applicable to various models, motorcycles, electric cars, bicycles. Can be used as a hook, one lock for multiple uses does not occupy space. Easy to install, no instructions required. It is recommended for round pipes with a diameter of 22-24mm. Nondestructive Installation: Small and light, easy to carry around or just leave it on your motorcycle handlebar. Nondestructive installation steps: 1. Stick the cushion on the handle 2. Put the gasket through the screw 3. Put the screw through the fixing clip 4. Fix on the handlebars 5. Install the lock body, tighten and fix the screw