Round nose pliers with nylon jaws are great for wireworking and wire looping. Nylon protects antiqued, plated and soft metals from marring.
Nylon jaws may need replacement depending on how often the tool is used and how hard the metals you work with are.
The tool is about 12cm big and has a double-leaf spring to reduce fatigue.
Any oil you may see on the tool is there to protect the mechanism. Simply wipe it off with a cloth.