The bits are sloppy in the guide bushing and allow for the bit to remove aluminum from the jig that it shouldn't as well as allow for unclean holes and tear-out. If your material is less than 3/4\" then it has enough wander that allows the head of the screws to be proud of the wood's surface. I think this jig has its place especially for the price point, but most people would expect a better result and experience. Vevor could and should improve on this design by making the guide bushings tighter to the bit and extending the buhings to the face of the wood. This jig was fine for my particular project , but I could see how it could leave people dissapointed. I would buy a kreg jig for double the price, unless they fix the issues stated. This has an oppertunity to be a great jig.