【Product Features】AOLISHENG 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 and impact resistance. 【Rust-proof, long service life】The surface of the slide has been electroplated with a blue zinc treatment to isolate direct contact between water and air, prevent oxidation and rust, and improve corrosion resistance. It has been tested over 100,000 times for opening and closing to verify its durability, and the normal service life of the slide rail is over 30 years. 【Solid Steel Industrial Ball Bearings for Better Weight Bearing】The slide rail is designed with two sets of internal ball bearings, all made of solid steel balls. In addition to maintaining the slide's mobility, it effectively increases the slide's load capacity. Full-extension drawer slides allow access to the entire space, and the drawers can be fully extended for easy storage. 【3-Fold Full Extension & Removable】 The 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 inner rails can be removed for easier installation and cleaning. 【Instructions for Use】The rail length must be ≤ the drawer length. 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.