CAP Barbell Black Olympic Rubber Grip Weight Plates, Single, 2.5 Pound CONSTRUCTION  These weights are made from solid cast iron and covered in rubber to provide a protective layer around the weight. The rubber coating prevents floors, equipment, and the weight itself from getting chipped or damaged. FEATURES  These Olympic weights have a 2" center hole to fit on Olympic bars. Each weight features grip holes to provide a secure grip. Rubber coating ensures a durable weight that will last a long time & prevents damage to equipment and floors. VERSATILE  Weight plates can be used to perform muscle strengthening exercises and endurance training, and to increase flexibility and balance. A single weight plate can also be used for warm-up exercises. CHOICES  These weights are available in 2.5, 5, 25, 35 and 45 lbs. The 25, 35 and 45 lb weights have grip holes for a secure grip when loading and unloading the weights. TRUST  Trust experience. CAP has been a pioneer in the fitness industry for over 30 years with locations worldwide. Chances are, if you have ever worked out before you have used a CAP product.