Feature●Size: Approx. 23.0 inches (58.5 cm) x Plate Width: 0.7 inches (1.8 cm); Weight: Approx. 22.1 oz (630●Material: Body: Zinc alloy + ABS/Key: High quality steel Includes: Holder, 3 keys, lock mat, wrench, screw nut, instruction manual (English language not guaranteed)●Strong and sturdy bicycle key. It looks smart and is very compact●Attaches to seat posts using included holders. Just leave your eyes off a little and you may be stolen. Use it as a theft deterrent●Includes 3 delightful spare keys. The size of the palm of your hand can fit into a saddlebag. Can be used on bicycles and motorcycles. Installation Method: 1. Attach the included holder to the seat post. 2. Tighten with a screw nut. 3. Attach keys if you install it. The key can be removed only when unlocked. Cannot be removed when closed. *If the post diameter is thin, please use the included matDescription Installation Method: 1. Attach the included holder to the seat post. 2. Tighten with a screw nut. 3. Attach keys if you install it. The key can be removed only when unlocked. Cannot be removed when closed. *If the post diameter is thin, please use the included mat