【Unique UPIDS】 There is a metal nut between the plastic wall of the upper ring band, with this nut, the screw can work with the metal nut, which makes the screw connect better with the plastic wall, will be tighter, not easy Loosen to extend the life of the lock ring. (Please refer to figure 2 for details) 【High Quality Lock Ring】Made of high quality plastic material, it has the characteristics of high density, high strength, high hardness and difficult to deform. Makes the scooter more stable when folded. 【Strong Compatibility】This round lock ring is perfectly compatible with Xiaomi m365, 1s, Essential, Pro, Pro2 electric scooters. 【Suitable Replacement】Lightweight and compact, easy to install and use, flexible and adjustable, durable, suitable for your electric scooter replacement. Package Content: 1 X Round Lock Ring