【Lock Protection and Versatile Use】Designed with a carabiner, the rail can be locked or unlocked with a swing handle and can be locked in closed and fully open positions to prevent sliding and ensure load safety. It can meet all kinds of household needs, such as large and heavy drawer slides, shelves, industrial drawers, toolboxes, RVs, trucks, etc. 【Fully Extendable and Robust】The extended length of the drawer is equal to the closed length. Made of Q235 cold-rolled steel with a tensile strength > 400 MPa. Thickness: 2 mm, 3.3 times a regular rail; Load capacity: 120 kg (265 LB), which is 4.4 times more than a regular rail. 【Rust-resistant and Durable】The surface is treated with high-quality blue galvanized zinc to prevent direct contact with air and improve oxidation and corrosion resistance. Rubber mats can reduce the drawer's closing force. Robust ball bearings provide a quiet and frictionless movement. 【Installation Guide】This product is suitable for product length ≤ cabinet depth. Mounting space to the left of the drawer: 0.75 inches (19 mm), mounting space to the right: 0.75 inches (19 mm). Note: Due to different usage scenarios, no screws are included with this product. You can purchase M5 screws yourself. Steel ball bearings 6 mm solid steel balls with high density, loaded and pulled more than quiet and smooth, durable use. Locked design The lock is accessible when fully open and closed Prevents sliding. Simple and safe control of the attachment Load capacity: Max load is 120 kg Material thickness: Premium steel plate: Thickness: 2 mm Q235 cold-rolled steel