Whether you’re fishing, making jewelry, or just trying to add another key to your keyring, you might find split ring pliers handy. Squeezing the handles causes the curved jaw to split open the ring, and the pliers keep it open as long as you keep applying pressure.
Xuron manufactures the pictured pair of split ring pliers. The lightweight pliers will open split rings down to size #00. They use a non-slip proprietary rubber for the handle grips and mold it into a shape that is comfortable to hold.
You can find the Xuron pliers online starting at $10 before shipping. If you’re looking for a bargain, there are cheaper brands out there.