Chaffes are primarily used in the medical field. These come in a variety of sizes, styles an colors. The STR Complete Chaffe is the two piece Chaffe and roller. This comes in 1, 1.5 and 2 inch sizes with 1/4 inch Hole. The SRT is just the metal Loop with a Roller that is available in 1, 1.5 and 2" sizes. These products are ideal for medical hardware such as orthotics and braces. They have a smooth polished finish that makes sterilizing easy.