3-Step Round / Concave. Wire Looping Pliers. Double Leaf-Spring, Box Joint. Great For Wire Wrapping Loops. These pliers are not as easy to find--and not as well known--as regular roundnose pliers, and I don"t know WHY. They"re easy to use, and give you perfect results when repetitive wire loop-making, and they are strong enough for making the finishing loops in heavy memory wire. One side of the nose is a three stepped round nose shape, and the other side is a flat shape that has PVC tubing to prevent scratching or marring the wire stock. With just a little practice, you will quickly master the use of these fantastic pliers, and I know you will love them. NOTE: Suitable for wire thicknesses up to 18 Gauge. Can be used with larger wire, but the risk of scratching the wire increases. Measurements: Approximately 6 1/2 Inches Long. Smallest diameter step is about 13mm, middle step is about 16mm, and largest is about 20mm.