Induction hardened & precision machined cutting edges Precision machined serrated jaws for optimum power and durability Automatic return action provides quick and easy wire twisting job while reduces fatigue Self-lock design ensures serrated jaw firmly grip wire while twisting Primarily used in the aviation and all forms of racing industries for wire locking nuts in safety critical applications Maximum wire capacity : twist 1.0mm dia., cut 1.0mm (Stainless Steel) Safety Wire Twisting Pliers 9 inch