I've purchased several products from the Pro Series line for my new wood shop because of the quality of the products they offer and the exceptional customer service they provide.  The 2' x 4' wall mounted shelf is a great addition to my shop.  The construction of the shelving unit is similar to the Pro Series cabinets in looks and quality.  The shelving unit can be stacked vertically or assembled together depending on your space.  I installed the shelving unit myself but it would be easier with a friend as the shelving unit is on the heavy side.  I plan on installing additional shelving units as I expand my shop.