The discus is an essential part of bodybuilding! With it, you can train various areas of your body. You can use it on dumbbells or on a weight bench. Cast-iron discs are generally used for machines. To help you find the model that best suits your training level, it's important to gradually increase your level of training, so that you can train your body exactly as it needs to be trained to reach your training goal. The 51 mm cast-iron disc stands out for its simple, unobtrusive appearance. It fits perfectly into any training environment. How do cast-iron barbell discs differ from one another? A glance at our range of equipment will show you that today's discs are available in a wide variety of materials, sizes and weights. If you already have a barbell, for example, it's important to make sure that the disc you choose fits it (depending on the diameter of the hole). Our Olympic discs have a hole with a bore diameter of 51 mm, compatible only with bars with a diameter of 50 mm. Then it's up to you to decide, according to your physical capabilities, whether you want to buy just a few, or whether you want to ensure greater flexibility with several discs. With us, you can choose between the following models:Weight: 1.25 kg - diameter: 16.5 cm | thickness: 1.2 cm. Weight: 2.5 kg - diameter: 19.5 cm | thickness: 2 cm. Weight : 5 kg - diameter : 26.5 cm | thickness : 2.5 cm. Weight : 10 kg - diameter : 30.5 cm | thickness : 2.8 cm. Weight : 15 kg - diameter : 37 cm | thickness : 3.5 cm. Weight : 20 kg - diameter : 45 cm | thickness : 3.9 cm. Weight: 25 kg - diameter: 45 cm.