Used To Flare Steel, Stainless Steel, Hard Copper And Brass Tubing Through A Wall Thickness Of 0.035" (0.9mm)For 1/8", 3/16", 1/4", 5/16", 3/8", 1/2", 5/8" And 3/4" TubingEasy To Use Ratcheting Handle Reduces Effort Required Especially In Confined AreasSets Up Quickly And Has Durable Eccentrically Mounting, Hardened Steel Flaring ConeHandle Clutch Releases When Flare Is Complete To Iron And Smooth Flare