ISF Rubber Coated Olympic 2" Weight Plates are a superb value to protect your floors when metal plates just won't do and bumper plates are too thick.  Sizes available are 45LB,35LB, 25LB,10LB,5LB, and 2.5LB.  The 45,35,25, and 10 lb plates are holed for easy grip in a revolver style.  5 LB and 2.5 lb have no holes.  Note these are rubber coated over cast iron.