Versatile TENNSCO Open Industrial Shelving offers strength and durability to store all your industrial supplies. Starter units can be used individually or combined with add-on units to complete a row of shelving. 22-gauge shelves are fully welded and lapped in two places for extra strength. Shelves are supported by 13-gauge compression clips instead of bolts and adjust in 1" increments and are 1"H to accomodate most label holders. Upright posts feature a square hole every third hole for easy shelf alignment.