Multi-Size Wrap 'n Tap Pliers 13-20mm. These pliers are so called because ring stock can be wrapped round the barrel shpaed jaw, then tap it slightly on a mandrel and instantly make a complete ring. Very little tapping is necessary and half round wire will not twist, scratch or deform. The pliers are good for looping stock that has a pattern or is hollow.The barrel has three sizes 13, 16 and 20mm to enable you to shape rings in various sizes or make consistent loops. The pliers are 6.5 inches long, made from stainless steel and the handles are PVC covered. The lower jaw is covered with PVC tubing and a spare length is included.