The Vintage Olympic Size Spin Lock Barbell Weight Collars are a set of two black collars designed for weight lifting. These Olympic collars are ideal for those looking to enhance their fitness routine by adding resistance during workouts. With a weight of 2.5KG, these collars are perfect for adding extra weight to your barbell exercises, helping you build strength and improve overall performance. Whether you're a beginner or a seasoned athlete, these collars are a versatile addition to your home gym equipment.