Large, slotted quick release wing nuts, for easy set up and removal. Flares all standard sizes of soft copper, brass, aluminum and soft steel tubing from 5/8" O.D. Self-centering yoke makes 45 ? flare joints without splitting or cracking. Long handle for added leverage. Flares sizes 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" and 5/8".