Valley Craft ProVault Jobsite Box - 18 cu. ft. 1,000 lb. Capacity, GrayValley Crafts ProVault Jobsite Box is the perfect solution for organizing any worksite. This 18 cu. ft. standalone storage chest maximizes space, improves cleanliness, and enhances security. An upper support rail system along the interior perimeter accommodates shelves and trays for smaller items. Use with steel accessory trays (sold separately) or with your own materials. Commonly used with jobsite plywood to create custom shelves horizontally or