I saw this product on HGTV a few years ago, and have never been able to locate one. I did some research and found that you have to buy their nails for it. I think it would be best suited for repairs or where a lot of nails are not needed, but even with repairs, you have the last row of nails that you could not use this tool with without risking damaging the shingle or nailing throuhg them. both are no-no's.