It was pretty hard to get them to fasten properly around my exhaust manifold, but with a flat head screw driver, pliers and a hammer it worked. I just didn't feel the re-assurance once I pulled it tight. The tie was able to spin around the piping and wasn't tight enought without using a screw driver and a hammer to ound it tighter and to flatten the linkage. Not bad overall but takes a little extra work than expected.