The NATO lock kit includes the NATO lock rail and NATO lock clamp. The NATO Lock Rail is a NATO rail for the NATO Lock products. The rail can mount on place with a 1/4″-20 threaded socket by using the included screws (Two screws may also be installed to prevent twisting). The threaded 1/4″-20 socket on NATO lock clamp allows compatible accessories to mount to the rail. The NATO Lock rail is 50mm which compatible with wooden camera NATO lock and other 3rd party NATO products.