Masking sets started to show up 10-15 years ago and the first sets were cut vinyl, which worked well on certain things but had difficulty bending around corners and staying in place. Eduard solved this problem a while back by going to low tack yellow tape that is sticky enough to fit into corners and stay put while painting is going on but still leaves no residue. There are precut and usually fit a specific kit.
This set fits HobbyBoss 1/48 A-6E TRAM kit and allows masking of several different parts. First, solid masks are included for the two large front windows. The small sides to the front and the main canopy have parts that provide a sharp out frame. The instructions say to mask with liquid masking and this works but I have also used Tamiya tape and that works also.