Deep knurled outer jaw surface with a centered hole for securely grip and the ring can be moved to the intended location. Spreads, removes and installs ring without holes. Commonly used on hydraulic brakes, differentials, transmissions, and CV joints. Made of carbon steel for durable and long time use. The ergonomically designed PVC handles for anti-slip and comfort grip. Premium spring-loaded provides overall control. Anti-rust oil will be added to prevent the pliers from rusting. Just wipe the pliers with toilet paper or a towel. For spreading snap or lock rings retaining parking brake adjuster cams to brake shoes, attaching pedals to shafts, inside transmissions, etc. Knurled outer jaw surface for positive grip on ring.