The Treston 830518-07P 4-Panel Steel Pegboard System can hold up to 10 panels and has a load capacity of 220 lb. per panel. It requires 21.5 square feet of floor space and provides up to 172 square feet of storage. The Treston 830518-07P 4-Panel Tool Storage System has casters on the lower edge of panels making them easy to slide in and out of frame. This unit does not require any mounting and sits easily and securely on the floor.