【Product Features】The heavy-duty drawer slides are made of high-quality cold-rolled steel, with high strength and high density. They can withstand heavy-duty 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 electroplated 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 both when fully closed and fully open to prevent it from sliding out. Quantity: 1 pair (2 packs), without screws. Load capacity 68kg, M4 screws can be purchased to suit