Double load bearing AOLISHENG drawer runners are made of 1mm high-quality cold-rolled steel, and the material is 1 times the thickness of ordinary runners. Full extension drawer runners hold 100 pounds, 40 pounds more than regular runners. Double anti-rust The surface of the drawer runners adopts electrophoresis black process, which isolates the direct contact between water and air, prevents the drawer runners from oxidizing and rusting, and improves corrosion resistance. 30-year service life Two sets of solid steel balls are used inside the ball bearing drawer runners to ensure smooth opening and closing of the slide rail. After testing, the number of smooth opening and closing of the drawer runner has reached more than 100,000 times. Installation Guidesuitable for drawers with inner depth 12"-14". Left side mount clearance: 0.5" (12.7mm), right side mount clearance: 0.5" (12.7mm). There are 8 screws in the card box at both ends of the product.please push the inner ball bearing to the top of the slide rail first, then connect it with the slide rail. There are electronic installation instructions at the bottom of the link. Hidden function The back of the slide rail is designed with a detachable buckle, which is more convenient to install.