Designed for door set manufacturers, can be installed as the fourth side of the door frame or retro fitted. Ergonomically tested for Part M compliance. Thermally broken to meet thermal bridging and insulation requirements, can be used with many different frame and door materials, e.g. wood, PVCu, fibreglass, aluminium, steel and carbon fibre. Designed to fit directly onto level thresholds. Ideal for use with carpeted floors, optional clip-in internal transition ramps also allow use with tiled or wooden floors. Non-slip surfaces ensure a safe grip in wet conditions.