The weighting for this set is one of the best systems I have seen. You will not have problems with this set losing their weights. When I tested this set out, I had to see what it would take to get the weights to loosen up. I needed 5 minutes with a flat head screwdriver and a hammer to get the weights out. The set weighs in at way over 3 lbs.
Fits the 2.25" tournament standard chess boards. I would recommend this set to play on our Rosewood mousepad chess boards.