If you are ever faced with a tricky screw with a ruined (badly worn) head, then these neji-saurus pliers will remove the screw with ease. Crafted in Japan, the neji-saurus plier’s unique patented jaw groove and lip design, allows you to firmly grip a screw and simply twist it out (normal pliers would just slip off), the jaws can even grip & extract truss head screws (low-profile dome heads). The neji-saurus pliers will also extract custom/specialized and tamper-proof screws.The pz-59 jaws also have inter-meshed jaw grooves, which allows very thin materials (such as shim) to be gripped & held firmly. The pz-59 Neji-saurus RX pliers are intended for use on screws with head diameters of 3mm – 15mm.