This one has the same problem as Startt, it's off 1 degree at 90. Which can be good in all hands for a handyman/homeowner, but as a professional carpenter I've just bought a tool for a specific job and it's not going to do it well. I have herds, some people get a good 1. If the seller CHECKS then send me a good 1, I will update. On the plus side, it's cheaper.