Xinda Stainless Steel Triangle Connecting Ring Meilong Lock Rock Climbing Equipment 6mm1. The lock is made of 304 stainless steel, which has the characteristics of high bearing capacity and wear resistance. 2. The locking screw door adopts a hexagonal design, which is not easy to slip when opening and closing, and is more smooth to use. 3. The screw mouth lock, the thread workmanship is precise and uniform, and it is not easy to get stuck in the groove when using it. 4. The triangular shape design makes it easier to connect, so that the