I hate having my tie move under my suit from side to side when I am giving a presentation or just moving around. Makes me look very sloppy. Up until now my solution was to pin the back fabric loop of my tie to my shirt (after putting the small end of the tie through that back loop). This worked very well but with too problems: (1) it was very hard to push a tie tack through all of those layers of cloth and (2) the tie tack back would frequently come off as I moved around. This solution does the same thing as the tie tac and solves both of those problems. It took only seconds to put on and did not involved damaging any fabric. Secondly there is no way this thing comes off once it is on your shirt buttons (until you want to take it off). Just like a tie tac it is hidden under your tie so no one can see it. The only weakness is that the tie can move slightly (less than half an inch from side to side) versus not at all with a tie tack. This is a small concession and well worth the benefit. There is one other advantage over a tie tac. Since the tie is free to move up and down (not side to side) if I tighten or loosen my tie I don't have to remove the tie tac. you get 5 of these but it seems as if they will last a very long time so I will probably give some of them away. A great idea.