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I purchased this kit to install blackout film to my bedroom windows but did not end up using most of it. The blade is so tiny that it won't cut anything (seemed to just stretch the film). I ended up getting a utility knife kit and they worked great. The solution worked well, but I think water in a spray bottle would be just as effective. I also think it left some type of residue, as the windows look dirty from the outside. The only thing I really used was the trimming tool, which worked fine to make sure I did cut the window frame. Overall a waste of money.