Usage Tips:Handcuff lock for e-scooter: unlike bicycles, e-scooters are difficult to secure with a conventional lock. Our uniquely designed handcuff roller lock solves this problem for you. Just like its handcuff-like appearance, the inner ring diameter of the handcuff lock is up to 8.5 cm. This is a very secure lock that can be used for e scooter, bicycle lock, ninebot e scooter, e scooter xiaomi, niu kqi3 pro and more. Material with high hardness: the e-scooter lock is made of fully alloy steel. The lock with key is hardened to withstand cuts, breaking and sawing, and offers the advantages of hard, wear-resistant and durable, not easy to oxidise and rust. The high-strength chain can withstand a tensile force of 10 kn and a shear force of 20 kn. The chain is wrapped with fabric to reduce noise, beautiful and scratch-resistant. Scratch-resistant rubber lock cover: as the e-scooter lock is made of alloy steel, it can scratch your mobility tool, even if the corners are polished. Therefore, the rubber lock cover is specially designed to protect your mobility tool, protects against marks and scratches, increases friction and slip resistance, improves gripping ability and improves grip comfort. It is your indispensable e-scooter accessory. Longer and thicker chain: the total length of the bicycle lock is 92 cm, the length of the chain part is 60 cm, the chain diameter is 6 mm, a longer and thicker chain rail extends the application area of the lock, which can be used for parking lots, backyard fences, street fences, etc., there are no restrictions on the use Can perfect as a bike lock, motorcycle lock, scooter lock, etc.