【Product Features】The heavy duty drawer slides from are made of high quality cold rolled steel, high strength and high density. They can withstand heavy storage without deformation. The bottom is equipped with a limited rubber bumper and ABS plastic for good wear resistance and impact resistance. 【Rustproof, Long Service Life】The surface of the slide has been Galvanized with blue zinc treatment to isolate direct contact of water and air to prevent oxidation and rust of the slide and improve corrosion resistance. More than 100,000 times of opening and closing tests have been carried out to verify its durability, and the normal service life of the slide rail is more than 30 years. 【Heavy Duty Side Slides with Locks】Press the black handles on both sides simultaneously to lock and unlock the drawer, locking it at both when fully closed and fully open to prevent sliding. Quantity: 1 pair (2 packs), without screws. Load capacity 68kg, M4 screws can be purchased to fit specific