1. Locking heavy-duty drawer runners provide secure operation. They can be locked closed or when fully opened to prevent sliding. Available lengths: 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000 mm. Suitable for shelves, industrial drawers, toolboxes, RVs, trucks, and more. 2. Side mount drawer runner. Quantity: 1 pair (2 rails). No screws included. Load bearing: 110 kg. Length: 650 mm (26 inch). Choose the rail size to match drawer depth. The slide length should be <= drawer length. Installation clearance: 19.5 mm per side. You can use different M5 screws according to installation scenario. 3. Rust prevention & long service life. Electroplated blue zinc finish. The plating prevents air contact with the steel surface, resisting oxidation and corrosion. Tested for more than 100000 open/close cycles. Normal service life exceeds 30 years. 4. Sturdy & removable. Made of Q235 cold-rolled steel, tensile strength > 400 MPa, thickness 2 mm. The inner rail can be separated by pressing the lock when the slide is fully open. 5. Use scenarios - In workshop or industrial environments for secure, heavy-duty tool drawers. - In RVs or trucks for durable, reliable mobile storage. - On shelving, carts, or cabinets requiring long-lasting, removable drawer rails.