Material: Durable rear mounted sockets manufactured with metal cold-rolled steel plated with zinc to prevents rust and corrosion. For use with face frame side mount drawer slides. Compatible with TCH-22102 drawer slides series. Versatile: Rear mounted socket hardware is great for use with face-frame cabinets for kitchen drawers, bathroom drawers, office furniture and store fixtures in both residential and commercial settings. Compatibility: Suitable for the width of 45mm (1.77 inch) side mount ball bearing drawer slides only. Extension: Rear mounted socket can extend the original length of slides. The extension length can reach 2.75 inch (70mm). Easy to Install: Provided with mounting screws and easy installation manual. Feel free to contact us for further questions or suggestions, we will be more than happy to answer you. wish you have a happy shopping. Keep your drawers easy to open and simplify your bathroom or kitchen setup with these sliding drawer rails. This sliding drawer hardware gives your drawers smooth and silent movement when opening and closing, and are a perfect addition to kitchen drawers, bathroom drawers, office furniture, and store fixtures. Constructed with high quality cold-rolled steel and featuring a galvanized steel finish for a refined appearance, these drawer slide rails are intended for use with face frame and frameless cabinets, and the drawer slide parts work well in both residential and commercial settings.