Heavy duty steel construction with a load capacity of 185kgs (30kgs for smaller drawers 35kgs for medium drawers & 50kgs for large bottom drawer). Ball bearing sliders for smooth opening/closing of the drawers with 5" x 1.25" rubber castors for added durability & keyed cylinder lock. 2mm drawer liners on each drawer & a 10mm top mat with black bumpers on the four corners to avoid damage when moving. Part of the Hilka garage solutions with additional matching components also available separately.