Knipex Internal 90deg Angle Snap Ring Pliers – 6 3/4″. KNIPEX Internal angled circlip pliers are designed for installing or removing circlips in bore holes. These pliers feature a solid forged style with non-slip angled solid tips that are forged as one part of the tool. The pliers body and tips are made from chrome vanadium steel which is forged and oil-hardened for durability. Additionally the pliers have a black atramentized finish for added protection.