Feature: Polyoxymethylene，Mechanical properties are similar to metals.excellent mechanical, chemical property, and high tensile strength，With excellent comprehensive performance, it can be used for a long time between -40 -- 100 degrees. Unique 360-degree rotaing block structure design makes it practical.Adjusts to 8 different fixed positions. The design is exquisite, convenient and reasonable.It can be used with 18mm and 25mm webbing ,Jadedragon D-Ring is a 360 degree MOLLE compatible buckle that is useful for tying down, holding keys, Sports bottle,Mobile phone pouch , Accessory bag,carabiners, MOLLE attachments, hydration line attachments Easy to install. An excellent accessory to use with your gears. Great for Molle systems, Practical for outdoor sports, hiking, camping, etc