Abstract: A combination tool for assembling and dismantling a lock nut includes a middle column, two clamping blocks, a guide rod, and two links. Thus, the two clamping blocks, the two links and the middle column are interconnected with each other and are moved in concert with each other, so that the distance between the two clamping blocks can be adjusted rapidly and arbitrarily, thereby facilitating the user operating the combination tool.

Abstract: A combination tool for assembling and dismantling a lock nut includes a middle column, two clamping blocks, a guide rod, and two links. Thus, the two clamping blocks, the two links and the middle column are interconnected with each other and are moved in concert with each other, so that the distance between the two clamping blocks can be adjusted rapidly and arbitrarily, thereby facilitating the user operating the combination tool.

Abstract: A plastic rivet puller includes two handles pivoted together, a first jaw plate fixedly fastened to one handle, a second jaw plate adjustably fastened to the other handle in one of a series of angular positions and adapted to work with the first jaw plate to pull the stud element of a plastic rivet from the socket element of the plastic rivet, the first jaw plate having a rightwards extended front jaw tip terminating in a beveled front end edge, the second jaw plate having a leftwards extended front jaw tip terminating in a beveled front end edge and adapted to work with the front jaw tip of the first jaw plate and to force the stud element of the plastic rivet out of the socket element of the plastic rivet when turning the handles to close the first jaw plate and the second jaw plate, and a stop plate pivoted to the second jaw plate and adapted to stop the front jaw tip of the second jaw plate from touching the front jaw tip of the second jaw plate, preventing damage to the plastic rivet during the pulling o