Features： 1、 fiber + nylon fiber material, sun-proof, anti-corrosion, strong and durable. 2、The lock body can be rotated 360 Degree, which is convenient to lock the helmet. 3、The stainless steel lock cylinder is anti-theft and durable. 4、Tamper-proof one-way screws included, easy to install. 5、Suitable for most types of vehicles like motorbikes, mountain bikes, road bikes etc. Specification： This motorcycle helmet lock is anti-theft and fit most kinds of vehicles, you don't need to worry about your helmet being stole by having this helmet lock. Features: fiber + nylon fiber material, sun-proof, anti-corrosion, strong and durable. The lock body can be rotated 360 Degree, which is convenient to lock the helmet. The stainless steel lock cylinder is anti-theft and durable. Tamper-proof one-way screws included, easy to install. Suitable for most types of vehicles like motorbikes, mountain bikes, road bikes etc. Specifications: Material: fiber + nylon fiber  Color: Black Product Weight: 104g / 3.7oz Package Size: 66 * 36 * 89mm / 2.6 * 1.4 * 3.5in Package Weight: 154g / 5.4oz Package List: 1 * Helmet Lock 1 * Key 2 * Screw 2 * Screw Nut 1 * Fixed Piece Package List： 1 * Helmet Lock 1 * Key 2 * Screw 2 * Screw Nut 1 * Fixed Piece