I agree with kazoo's colorful description! They are strong enough to keep your press secure. You're not going to rip it out either unless your using blood-rotted wood from the old ambulance. I've got a mount under my press from these guys http://inlinefabrication.com/ to increase my height. It probably distributes the load much better than having 3 or four inserts close together. Even then, I don't think you'd have a problem.
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