I purchased this from Amazon about six months ago. I only tried it once and have been storing it since. Color: Gray Includes bracket, cable, and 3 keys. <Excerpt from Amazon below> 【Heavy-Duty U-Lock】ROCKBROS U-lock uses a high-strength alloy steel with a diameter of approximately 14mm and a zinc alloy cylinder, making it more durable than ordinary products and improving security, making it difficult to cut. It cannot be cut even with a 12-ton hydraulic cutter. You can securely fix your precious bicycle to poles in the bicycle parking area, preventing malicious bicycle theft. 【With Cable】For a wider range of applications, it is safer to use it in combination with the cable. The wire is made of a double cable woven with light and strong steel cord, making it difficult to cut. It is more convenient to use in conjunction with the U-lock. 【With Silicone Cover】To protect your important bicycle or motorcycle, a silicone cover with a good feel is used on the surface, finishing the lock. It is less likely to scratch the body or frame during transport, so please feel free to use it. Attach the U-lock to the bicycle with the included bracket and attach it to the frame of the vehicle, eliminating the need to carry it around. 【Key Lock】Easy to lock and unlock, pursuing ease of use. Comes with 3 keys. There is no need to worry about losing the keys. The keyhole dust cover protects the keyhole from dust and water. It prevents rust and extends the service life. 【Reliable Quality Guarantee】To prevent theft of your important bicycle! The weight is about 805g, and the size is shown in the photo. The product has a one-year return, refund, and exchange guarantee from the date of purchase. This U-lock is applicable not only to bicycles but also to motorcycles, electric vehicles, scooters, doors, etc.