Knipex 4921A01 External Angled Precision Retaining Ring Pliers 5.2-Inch Large contact faces on the tips: no distortion of circlips, easy fitting. For rings 3 - 10 mm in diameter. Sturdy, inserted tips: made from high density drawn spring wire. Forged from chrome vanadium electric steel and designed to minimize tip breakage, and offer extended tool life. Plastic coated handles.