●【Rust Prevention & Long service life】Adopt electroplated blue zinc treatment, the electroplating layer prevents the air from directly contacting the track steel plate, thereby resisting oxidation and corrosion.Passed more than 100000 opening and closing tests, they are durable and the normal service life of runners exceeds 30 years ●【Side Mount Drawer Runner】Quantity: 1 pair(2-Pack) screws not included. Load bearing: 68kg. Length: 800mm(32 inch). You can choose the size of the rails according to the depth of the drawer. The length of the slide should be ≤ the length of the drawer. Installation clearance: 12.7mm(Each). You can purchase different M4 screws according to the specific installation scenario. ●【Double ball bearing】Double rows of solid steel balls make the drawer open smoother and quieter. Rubber cushion, avoid pushing and pulling collision during use ●【Full Extension Heavy Duty Drawer runner 】Thickness: 12.7mm, which is firm and stable, and has better bearing capacity. 3-Fold ball bearing full extension drawer runners, so that the drawer can be fully drawn out, which is convenient for storing items. ●【Without Lock and Removable】The without Lock heavy duty drawer runners are designed with a removable snap, which can easily remove the drawer by pressing it. Suitability for shelves, industrial drawers, toolboxes, RVs, trucks, etc.