The allgood FT9451 is a closer designed for use on doors, allowing them to be opened to 180°. It features an alternative frame bracket (9151FN) that must be morticed into the head frame, with alignment marks on the bracket that must be in line with the face of the door. The closer body fixing holes must be drilled at an angle of 18 degrees, and it requires 4 x 32mm No. 8 self-tapping screws for installation. Additionally, a 10mm diameter hole must be bored on the center line of the door and plugged at the head, with a drill size of 3mm.