A tool for securing items together closes C-rings to create hog rings. A drive mechanism allows the tool be used continuously for a greater length of time than heretofore possible without inserting a new string of C-rings. The drive mechanism utilizes one-way clutch bearings to provide a ratchet-like mechanism. Each time a trigger on the tool is pulled, a C-ring is closed and another C-ring is advanced to a position in which it may be closed by the same jaws. A pneumatic system moves a piston inside a cylinder to move the C-rings along a magazine towards the jaws.