Complete double flaring tool assortment . Slots on yoke firmly engaged with bar assembly. Includes corresponding adapters for forming double flares. Forged alloy steel and through hardened . Storage case with full instructions Precisely flares tubing up to 0.040 wall thickness to SAE 45 degree flares. Hardened bar assembly clamps 7 tubing sizes: 3/16", 1/4", 5/16", 3/8". 7/16", 5/8", and 1/2". Do not use on stainless steel tubing.