Five tiers on each 60-in tall garage shelving unit create vertical storage for tools, bins and supplies while helping you organize tight spaces. Thick MDF shelf boards rest on a metal frame with reinforced support ribs so each shelf supports up to 440 lbs for a total capacity of 2200 lbs. Height-adjustable shelves let you fit items of different sizes without wasted space. The frame converts from one tall rack into two horizontal workbenches, and anti-toppling devices and non-slip foot pads help improve stability during use.