Abstract: An improved hole-punching pliers has a holding part and a pressing part that are in pivotal combination with each other by way of a pair of connection plates. The holding part and the pressing part are provided respectively with a dentate engaging section so that they can be partially in mesh with each other in assembly to provide a secondary fulcrum in addition to the connection plates. Thereby when the holding part and the pressing part are held by a pair of connection plates and pressed with force, the mesh of the dentate engaging sections of the holding part and the pressing part can produce a double lever effect, rendering effective transmission of force applied to the holding part and the pressing part to punch a hole on an object.

Abstract: A hacksaw including a frame, a handle, an end piece, and a blade. The frame has an arcuate support rod which is provided at one end thereof with a protrusion and a plurality of recesses, and at the other end thereof with a protrusion and a plurality of recesses. The handle has a top cross rod which is provided with a receiving slot and a plurality of projections and is fastened at one end thereof to the arcuate support rod such that the receiving slot of the top cross rod receives the protrusion of the arcuate support rod, and that the projections of the handle are received in the recesses of the arcuate support rod. The handle is provided with a fastening member opposite in location to the top cross rod for fastening one end of the blade. The end piece is fastened to other end of the arcuate support rod and is provided with a slot for receiving the protrusion of the arcuate support rod, and a plurality of projections which are received in the recesses of the arcuate support rod.