【Solid Steel Industrial Balls for Better Weight Bearing】The slide rail is designed with two sets of ball bearings inside, all made of solid steel balls. In addition to maintaining the mobility of the slide, it effectively increases the load capacity of the slide. Full extension drawer slides allow access to the entire space, and the drawers can be fully extended for easy storage. 【Rustproof, Long Service Life】The surface of the slide adopts an electrophoretic black process, which isolates the 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. 【Full Extension Slides】Full extension slides allow access to the entire space and the drawers can be fully extended for easy storage. The slides are designed with two sets of ball bearings inside, all made of solid steel balls. In addition to maintaining the smooth running of the slides, these bearings effectively increase the load capacity of the slides. 【Product Features】Heavy-duty drawer slides are made of high-quality, high-strength, and high-density cold-rolled steel. 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. 【Usage Tips】The length of the rail should be ≤ the length of the drawer. The metal parts are sharp during installation. It is recommended to wear gloves for installation. You can choose the size of the rails according to the depth of the drawer. We wish you a happy life.