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-58 Neji-saurus GT pliers are intended for use on screws with head diameters of 3mm to 9.5mm (therefore M1.6 to M5 for Roundhead screws anf M2 to M4 for Truss Head Screws).