Are they powerful? Yes.very.but only in one direction.and you stand over him and try to pull him off the metal table. They are weak and give lateral pressure. They slide fairly easily even with two built into a simple jig. And that's the last thing you need with ANY type of precision gauge. Think about how your table saw slides as you cut through a piece of wood. And no, I didn't make a fence for a table saw. I'm just trying to give you a visual reference. Most of the things that we make as jigs have to be very stationary and that's why we have things like slots and guard rails when using tools. This is to prevent things from moving from side to side. Nobody's trying to get their fence in the air. We try to prevent it from slipping. With all that has been said, don't expect it to stay that way. No, not even with two of them in one device. I gave it 2 stars just because I think the marketing strategy is a bit misleading. You might want to rename it to MagJig 95/10. 95 pounds of down power and 10 pounds of side power.