The Dent Fix EZ Nitro plastic welder kit, No. DF-EZN1, is easy to use, and incorporates a proprietary Flow Adjust Switching Technology (F.A.S.T.) eliminating the need, and thereby the hassle, of adjusting and setting the proper air and gas flow. Other nitrogen plastic welders require the user to adjust and set the flow of both air and nitrogen, which can lead to errors or poor results, says the company. The unit features large amounts of storage for tools and material including holsters for both a heat gun and hot stapler. The EZ Nitro kit includes a nitrogen regulator, airless welder, hand seamer and consumable packs. The unit comes with a five-year warranty.