Medium duty for general applications. Full extension draw slide with single track mounted under drawer. Rated at 50 pound load capacity. High density polyethylene rollers. Height 1". Minimum side clearance 1/8", 1-1/2" from rear of drawer to cabinet. Mounts with staples or screws. Made of steel, zinc-plated. Drawer needs to be 3/8" shallower than opening. Poly bag with screws.