Stack-On Products was one of the largest manufacturers of toolboxes, tool cabinets and gun safes in the country. Hydra Corp. built Stack-On’s original 60,000 S.F. manufacturing plant on Old Rand Road in Wauconda. Two years later, an additional 40,000 square feet was added. Then, after securing a contract with Wal Mart and K-Mart, Hydra Corp. built an additional 100,000 square foot, state of the art warehouse addition to the original 100,000 square foot facility. With generous column spacing and 34’ in-the-clear ceilings, this new warehouse addition gave Stack-On 200,000 square feet, allowing a workforce of nearly 350 to work in three shifts and allowing for the production of millions of tool boxes, cabinets and safes.