Yes, these are a blatant knockoff of Footmasters. But at 1/4 the price, I'm willing to roll the dice with these. I put a 600 lb woodworking jointer on top of these. It now moves effortlessly and levels nicely on my uneven floor. I'm quite happy with the performance. Given that they're knockoffs I'm not going to try to push the weight rating with them. I'm quite happy with how they've worked out so far.