1. Description The "U" shape front plate (aluminum alloy) is mounted on the lateral side of door, and main lock case and auxiliary lock cases, which are mortised into the door, are mounted on this plate. The strike plate is mounted on the face side of the frame with suited holes to the deadbolts and latch. Suited profile cylinder is keyed into main lock case and is fastened with screws, which retracts the latch and operates deadbolts of main lock and auxiliary locks with a double turns (10 mm and 20 mm projection). The deadbolts are operated by key from either side. Reversible latch bolt is operated by key or handle from either side. Latch and deadbolts are bright nickel-plated. 2. Package: Each lock is packed into one carton. 3 Accessory One piece of cylinder with five pieces of keys. One set of covers for cylinder. One set of screws 4. Price USD20.3 per set FOB Qingdao seaport, China. One 20' container can carry 2500 sets of locks. 5. Front plate or strike plate option 1). Different dimension. 2). Different lock case position. 3). Different screw holes position. 4). Different painting 5). "U" shape (aluminum alloy) or flat (steel) front plate. Cerraduras de Seguridad Largas (Cerraduras multipuntos de alta seguridad para embutir)