Dutch Design Offers Assembled or RTB Cabinetry. Unlike RTA (Ready To Assemble), our RTB(Ready To Build) cabinets do not have cams or mechanical fasteners. They are simply standard cabinets built the traditional way just shipped to you unassembled. This affords extreme quality found in no other cabinet. You simply put them together. Use Coupn Code "RTB2D2" to order RTB Cabinets at 15% off.