Product review (3 stars): Great idea, good design, bad product
I bought this accessory because, I usually work alone when installing doors and figured this would make my life easier. I guess not, the tacks fit pretty well on my level(only works on newer Irwin box beams, not the older ones) however the 12yr old kid who cut the threads in the nut did a really bad job! When a consumer purchases a product they shouldn't have to fix it before using it, but it was made in china, where quality control is ALWAYS on vacation. After fixing the threads it worked ok, but the steel is really soft, eventually I will just run a bolt through the center to fix that problem when it arises.