Abstract: A nail anchor for use with a wall nail for nailing to a hole in a wall of an object is disclosed to include a tubular body having a tapered end portion and a longitudinal split, a plurality of teeth obliquely upwardly and outwardly extended from the periphery of the tubular body for engaging into the periphery of the hole in the wall of the object to prohibit the tubular body from a backward displacement relative to the wall of the object and a plurality of barbed portions obliquely downwardly and inwardly extended from the periphery of the tubular body for engaging into a spiral groove around the periphery of the wall nail to prohibit the wall nail from a backward displacement relative to the tubular body of the nail anchor.

Abstract: A nail-belt for use in a nail gun to feed nails is disclosed having a plurality of nail sockets for holding nails individually, each nail socket having a top ring, a bottom ring and a flat connection portion vertically connected between the top ring and the bottom ring, and a plurality of links respectively transversely connected between the top rings of each two adjacent nail sockets and the bottom rings of each two adjacent nail sockets.

Abstract: A nail set includes a nail to be driven by a nail gun into a workpiece, and a stub screw rod to be fastened to the workpiece with the nail. The stub screw rod has an axial through hole approximately equal to the diameter of the shank of the nail for the passing of the nail so that when the nail is driven into the workpiece, the stub screw rod is carried by the nail and stopped between the workpiece and the head of the nail.

Abstract: A beam clamp having a C-shaped clamp body, which has a threaded through hole on the top side and two parallel vertical cuts on the middle, and a hanging plate, which extends downwardly from the clamp body and suspending between the two parallel cuts and has a hanging hole and a plurality of forwardly and backwardly curved and threaded semicircular flanges alternatively disposed at different elevations for the hanging of a heavy object.