Fire-resistant and/or tamper-proof bolt to prevent the leaf from slipping off on the hinge side. 25 x 4 mm galvanised metal cylindrical body machined from solid, with 2 countersunk fixing holes. M6x20 threaded pin for hexagonal key, pointed end. One-piece galvanised metal strike, machined from solid 25 x 3 mm, with two countersunk mounting holes. Weight of device complete with strike: 20g