*Update* Almost exactly a year later, the measuring tape fell apart. The spring stopped the tape measure from retracting and didn't return, it broke. after a few months it wasn't that strong anymore. When I first got it I was able to pull it out 15 feet before it sags and bends, but after a few months it started to weaken. he would not have gone more than three or four feet before he fell. With that in mind, I just bought a new one. The magnets are very strong and stick to the end of the tape measure. A lot of other brands have small magnets that fall off, but they hold on, which is a big plus. and as i said in my original review it has numbers on both sides. At first I liked it but now I can't live without it, I hate working with other people's roulettes that only have numbers on one side. Original review: Really strong magnets. numbers on both sides. As an electrician I use this basically every day, drop it, pat on my tool bag, have worn it for a couple of months and it's holding up great. I recommend