I purchased this fence because it was the only 40" I could find (50" or more was just too big for my tiny shop). I have used this fence for 3 years and can say it is without a doubt the worst fence I have ever used in almost 20 years of cabinet making. You have to lock down both the main clamp and the micro adjust clamp just to keep the fence from drifting or deflecting, and even then it needs to be checked repeatedly. I have wasted a lot of stock because the clamps loosened and the fence drifted. And with the face of the fence painted black, it's nearly impossible to tell if stock is pulling away from the fence. I can't wait to replace this liability.