The PRO800801 Swivel Storage Solutions PRO 80 Modular Series 1-Drawer Stationary Modular Storage Unit was designed to give you maximum durability and to give you additional storage space in your PRO 80 or 81 modular set. All Swivel Storage Solutions products come with a swivel hinge system, which unlike the regular slide-out drawers, is free from having slides and bearings failing and getting stuck over time.