This tool set includes everything to flare thin wall steel, aluminum or.040 wall soft copper tubing. The set includes 5 thread dies and adapters for forming double flares on the following tubing sizes: 3/16", 1/4", 5/16", 3/8" and 1/2". The set is packaged in a durable, oil and grease resistant polyethylene box for storage. Full instructions are included. Skin-packed with tray. Shipping wt. 2 lb. 3 oz Double Flaring Tool set makes both single and double SAE flares. NOT FOR USE ON STAINLESS STEEL TUBING