Galvanized iron plaster stop bead engineered to provide a clean, reinforced terminal edge and straight screed guide wherever plaster or render ends. Fabricated with an expanded metal diamond-mesh wing for optimal mechanical keying into the mortar base and a rigid channel stop that defines the plaster thickness. Ideal for terminating wet plaster against dissimilar materials, unplastered brickwork, door frames, window openings, and wall skirting lines without crumbling or cracking.