Solid Steel Industrial Balls for Better Weight SupportThe slide rail is designed with two sets of ball bearings inside, all made with solid steel balls. In addition to maintaining the mobility of the slide, it effectively increases the load capacity of the slide. Full extension drawer glides provide access to the entire space and drawers can be fully extended for easy storage. Anti-rust, long service lifeThe surface of the slide has been galvanized with blue zinc treatment to isolate the direct contact of water and air to prevent oxidation and rust from the slide and improve corrosion resistance. More than 100,000 times opening and closing tests have been carried out to verify its durability, and the normal life of the sliding rail is more than 30 years. 3-Fold Full Extension RemovableThe triple extension allows the slides to be fully extended, allowing the drawer to be fully extended for easy access to the entire drawer storage space. By pressing the locking handle and continuing to pull, the interior rails can be removed for easy installation and cleaning. Product FeaturesHeavy duty drawer slides are made of high quality, high strength and high density cold rolled steel. They can withstand intensive storage without deforming. The bottom is equipped with a limited rubber bumper and ABS plastic for good wear resistance and impact resistance. Usage TipsThe length of the rail should be the length of the drawer. Metal parts are sharp during installation. It is recommended to wear gloves for installation. Heavy-duty sliders do not come with screws. You can buy M5 flat head screws yourself.