A device (10, 50, 100) for repairing a hole in a wall structure, the device (10, 50, 100) comprising: a body (12, 52, 102); a plurality of arm members (40, 80, 120) mounted relative to the body (12, 52, 102), wherein a webbing member (22, 62, 110) extends between two or more of the arm members (40, 80, 120); and a displaceable member (30, 70, 90, 118) associated with the body (12, 52, 102); and a sleeve member (20, 60) slidably engaged with the body (12, 52, 102), wherein the displaceable member (30, 70, 90, 118) can be displaced, which displacement causes the sleeve member (20, 60) to slide along at least a portion of the length of the body (12, 52, 102), actuating the plurality of arm members (40, 80, 120) to move relative to the body (12, 52, 102) between a retracted condition and an extended condition in which the webbing member (22, 62, 110) is stretched relatively tightly between the arm members (40, 80, 120) to form a substantially planar surface, and wherein the device (10, 50, 100) is configured to be collapsible upon impact to the device (10, 50, 100), characterized in that the displaceable member (30, 70, 90, 118) comprises guide members and an actuation portion, the displacement of the displaceable member can be achieved by pulling the actuating portion out and away from a first end of the body causing the guide members to engage with and move the sleeve member along at least part of the length of the body towards a first end of the body, whereby, when the device is locked in position, i.e., when inserted into the hole located in the wall structure, with the arm members in the extended condition, and the webbing member moved towards and against an inner surface of the damaged wall structure, the actuating portion of the displaceable member can be pushed back towards the first end of the body so that the surface of the webbing member is relatively planar. a body (12, 52, 102); a plurality of arm members (40, 80, 120) mounted relative to the body (12, 52, 102), wherein a webbing member (22, 62, 110) extends between two or more of the arm members (40, 80, 120); and a displaceable member (30, 70, 90, 118) associated with the body (12, 52, 102); and a sleeve member (20, 60) slidably engaged with the body (12, 52, 102), wherein the displaceable member (30, 70, 90, 118) can be displaced, which displacement causes the sleeve member (20, 60) to slide along at least a portion of the length of the body (12, 52, 102), actuating the plurality of arm members (40, 80, 120) to move relative to the body (12, 52, 102) between a retracted condition and an extended condition in which the webbing member (22, 62, 110) is stretched relatively tightly between the arm members (40, 80, 120) to form a substantially planar surface, and wherein the device (10, 50, 100) is configured to be collapsible upon impact to the device (10, 50, 100), characterized in that the displaceable member (30, 70, 90, 118) comprises guide members and an actuation portion, the displacement of the displaceable member can be achieved by pulling the actuating portion out and away from a first end of the body causing the guide members to engage with and move the sleeve member along at least part of the length of the body towards a first end of the body, whereby, when the device is locked in position, i.e., when inserted into the hole located in the wall structure, with the arm members in the extended condition, and the webbing member moved towards and against an inner surface of the damaged wall structure, the actuating portion of the displaceable member can be pushed back towards the first end of the body so that the surface of the webbing member is relatively planar.