I bought two sets of these tools. The first set (black) had 7 knobs and was pretty solid. The glue didn't work to attach it to the door but the pins in it stayed in place when opened/closed. The second set (white) came with only 5 buttons. I've cleaned both doors I've used them on, but the glue barely stuck to the first and not at all to the second. I was planning to use potholders but as there are only 5 gaps between the potholders when opening and closing the door. So far so good, but next time I go to the hardware store I'll buy a different sealant. The profile of the seals is also not suitable for all my doors, only for some. Since the part that needs to reach the bottom sill is well *in front* of the door, it only works well on door frames where the sill extends well beyond the door, or interior doors with no sill. On one of my doors, it doesn't touch the threshold at all because it's the wrong shape. If it was just a flat piece of rubber it would work fine. Conclusions: It's cheap and good, but might not be right for your specific situation.
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