Knipex Precision Internal Snap-Ring Pliers heavy-duty construction increases life of tool up to 10 times over conventional snap rings. These pliers are made from chrome vanadium tool steel and feature sturdy inserted tips made from drawn spring wire. Their slim head style allows use in confined areas and large contact faces and position of tips make it difficult for snap rings to slide off and doesn't distort rings. Precise smoothly operating screw joint that has protected captive spring in the joint for exception control and feel.