Built-in deadbolt provides that extra sense of security. Designed for travel trailers, yet works well with cargo haulers, horse trailers or custom utility trailers. Fits door thicknesses from 1-1/4" to 1-1/2". Made from durable zinc die cast. Includes door edge cover plate, strike plate and mounting screws. 1 per box. Approximately 3.47" x 4.28"