SET OF 8 Plates: EVERYMATE fractional weight plates include 2 x ¼ LB, 2 x ½ LB, 2 x ¾ LB, 2 x 1 LB. Thanks to these lightweight fractional plates you can slowly increase your weight-bearing load by putting on an extra ½ LB to 5 LB. These fractional plates have 2-inch center holes and will fit on Olympic barbells and 1-inch barbells with an Olympic sleeve adapter Rubber Coated Steel Fractional Weight Plate: EVERYMATE fractional plate is made of steel core which adds stability for plates.Corrosion-resistant, no peculiar smell. Don't worry about the smell of rubber in the fitness area at home