I installed a Vintage Air retrofit A/C system on my 1967 Mustang. I thought the kit would come with premade hoses, but instead came with a kit to make my own hoses. I had difficulty finding a local shop willing to make the hoses for me using the parts that came in the kit. I purchased this tool and made my own hoses. The crimps may not look quite as perfect as a premade hose, but they came out pretty good and they do not leak.