Stopper expands

The utility model relates to a stopper expands. It includes the stopper expands head and the stopper expands body, is equipped with fracture mouthful along vertical center of stopper expands head, is equipped with the pawl at the lateral wall of stopper expands head, is equipped with the screw entrance hole along vertical center of the stopper expands body, and the aperture of screw entrance hole is greater than out split bore, be equipped with on stopper expands personally experiences sth. Part of the body the top lateral wall one with its fixed plate that links firmly, be equipped with the friction line at the lower surface of fixed plate, be equipped with the locating hole on the fixed plate. The utility model has the advantages of reasonable design, at the in -process of self tapping screw screw in screw entrance hole, it is rotatory that self tapping screw is followed to the stopper expands will not, has guaranteed the fastness of pawl and the interlock of wall body drilling inner wall looks on the first lateral wall of stopper expands, has improved stopper expands's steadiness and bearing capacity.