The Dorguard Fire Door Retainer System 205 x 195mm (H x W) Black, is made of ABS plastic material which makes it strong and durable. The Dorgard provides a wireless solution for legally holding open fire doors in any position, automatically closing the door when the fire alarm sounds. The door retainer is the safe and smart choice for fire door retaining problems. It tempts to hold fire doors open with wedges or, ironically, fire extinguishers. The product complies to British Standards and is tested to BS 7273-4: 2015 actuation of the release mechanism for doors. The Dorgard is the manufacturer and supplier of safety and physical security devices for fire doors, commercial and residential external doors, driveways and parking bays.