1. LOAD CAPACITY, LONG LIFE The heavyduty drawer slides feature a material thickness of 1.9mm, density, and strength, with a load capacity of 80/120/160kg. They have undergone over 100,000 opening and closing tests, ensuring durability and a normal service life exceeding 30 years. 2. Installation Requirements You can select the rail size based on the drawer depth. *The slide length should be the drawer length. Installation spacing: 19.5 0.5 mm (each side). Note: Mounting screws are not included. 3. Lockable and NonRemovable Lockable both when closed and fully open to prevent slipping and ensure load security. Nonremovable design. 4. Easy Installation Predrilled mounting holes make these drawer slides easy to install. Simply pull the buckle handle away from the side while holding the inner fixed rail.