Upgrading or building some drawers? These JI2OOYI drawer slides are a solid choice. You get FOUR complete pairs (that's 8 individual pieces) of 10-inch long, side-mount slides. They're made from cold-rolled steel with an electro-zinc plating to resist rust. The best feature is the \full extension\ – they're a 3-stage design, meaning the drawer pulls out completely, giving you 100% access to the very back. No more digging around blindly! They have a smooth ball-bearing action and are rated to hold up to 100 pounds per pair, which is plenty for most household drawers. They also have a handy detachable feature; you can separate the drawer part from the cabinet part by pressing a plastic clip, which makes installing and cleaning way easier. They include mounting screws. Important sizing tip: The slide length (10 inches here) should be about 1 inch SHORTER than the total depth of your cabinet box (not the drawer front). So, measure your cabinet interior depth first! Great for DIY projects in the kitchen, bathroom, office, or workshop.