Abstract: An improved structure of a screw mounting device comprising a machine body, a machine tubing, a controlling module and a retractable adjusting device located at one lateral side of the machine body, the end face of the front end of the machine body being a sloping side to allow a sliding wheel of the controlling module to urge against the sliding, the controlling module comprising a guiding rod, the sliding wheel and a cavity body and the controlling module located at the side of a screw insertion slot module, characterized in that the lateral side of the sliding rod is extended to provide a shaped holding block, and the holding block is appropriately mounted at a recess located at the bottom section of the screw-pushing plate, the sliding wheel is pivotally mounted at the top section of the guiding rod, and the bottom section of the guiding rod is provided with a spring within the cavity body, thereby when the sliding wheel urgingly slides together with the sloping side, the guiding block is simultaneously m

Abstract: An improved magazine structure for nailing machines includes a magazine body. The magazine body includes a base disk, a supporting disk, and a rod fixedly disposed on the supporting disk. The base disk is provided with a slot for passage of the rod. The rod has a sliding wheel disposed at a bottom portion thereof to allow the rod to displace slidably along the slot. The rod is disposed at a central position of the base disk, whereby the rod disposed at the central position of the base disk is caused to displace slidably outward to bring the support disk to displace therewith, so that a nail reel can be fitted vertically onto the supporting disk to achieve convenient and quick installation of the nail reel.