Why didn't we think of this before ? Sold as a set of 4 , these foamdisks (hiqh quality yoga mat foam ) are shown with our base handle. This way, you get big puffy (comfortable setups at lower weights. Remember, the foam disks are really for weights at or below 25 or maybe 30 lbs. Past that weight, clamping the stack tight enough to hold the plates in place will crush the foam discs beyond their usefulness.