Ingenious running pliers have a patented pressure system that allows them to be positioned from any angle - great for running difficult scores, especially inside curves. Just center the score line in the "window" and apply even pressure to produce accurate and clean breaks. Replacement jaws available (#40485). Made with a non-metal composite.
Delphi Tip: After scoring your circle on the Scoring and Breaking Mat, use Ringstar Pliers to apply even pressure on the score at 3" intervals around the circle, running the score.