Knipex precision circlip pliers for external circlips on shafts knipex 49 31 a2 these 180mm l precision circlip pliers from knipex are ideal for mounting external circlips onto oslash 19 60mm shafts making them ideal for series production as excessive expansion of rings is effectively prevented manufactured to a high standard the body and straight tips of the pliers come in chrome vanadium electrical steel which are both forged and oil hardened heavy duty in continuous operation off