EASY TO USE: The lever-lock flaring bar of the bubble flaring set makes the tool kit easy to use for professional and DIY mechanics. SET INCLUDES: Our ISO bubble flaring toolset includes a flaring bar and all the adapters needed for ISO bubble flaring. It also includes a storage case with full instructions. COMES WITH 4 TUBING SIZES: The set has been designed to precisely flare tubing up to 0.40 wall thickness to metric 45-degree flares from 4.7MM, 6MM, 8MM, and 10MM. All these 4 dies are helpful to complete the bubble flaring tool assortment. BUBBLE FLARING ISO TOOL KIT: This set has been designed for crack-free bubble flares on soft steel tubing used in automotive brake systems. Now you can make your own brake lines with the bubble Flaring I.S.O tool Kit, designed for metric soft steel brake lines, which requires an Iso or bubble style flaring.