End back strain, save time. All-welded structural channel construction with heavy gauge flux core for heavy-duty use, increased efficiency, less fatigue and safer operation. Heavy-duty springs allow one person to operate it up and down, locking mechanism assures rigidity in use—stand can’t fold during raising or lowering operation. Once stand is in desired locked position and loaded, it cannot be adjusted until load is taken off. Do not move when loaded. Stands collapse to save storage space and shipping cost. Made in USA.