Kraftsman Cabinetry Aspen White RTA Flat-Pack Cabinets Standard Wall Units come flat packed and ready to assemble. You can also select a fully-assembled option. These sturdy kitchen cabinets are constructed of 1/2 inch solid plywood and have adjustable shelves. Because each individual piece is pre-drilled with pilot holes, the wall cabinet can be assembled with a power screwdriver. Hardware is included.