I had an issue to where the surface that I had my laser engraver on, was too smooth and would shift the engraver around with the rapid moves. I created these stabilizing feet to place on each corner to keep it from moving. There are no special requirements for printing, as long as your model doesn't split when screwing it down. I used small self-tapping screws to secure them to the table, but I cant remember what size they were, as I've thrown away the box of the fasteners. These feet are not just limited specifically to laser engravers. These can also be used to secure any square shaped object steady as they have a fairly low profile.