A device for holding a door open comprises a tube in which an axial rod can slide, the free ends of the rod and tube each incorporating a pivotal mounting. The tube and the rod each carry complementary locking components whilst the rod also incorporates a release sleeve which is axially movable w.r.t. the rod. When the device is to be disengaged, the door is opened slightly further causing the release sleeve to lift the resilient teeth on the tube away from the flange on the rod. This allows the door to be fully closed.