The Active Hands D Ring Exercise Aids include a pair of padded wrist cuffs with attached rings. Users with limited hand function or limb differences will find these adapted gripping aids allow them to use certain equipment by hooking the wrist cuff to attach directly to the gym equipment carabinger. The Active Hands D Ring Exercise Aids allows users the benefit of a greater range of movement as well as pulling directly from the wrist. Constructed from tough webbing and comfortable but durable neoprene (wet suit material), these adapted gripping aids are designed to withstand strenuous activities including weight lifting. The D ring hooks directly on the carabiner on cable pulleys and other attachments. The wrist section is tightened using a strip of velcro with a ring on the end. Attached to this wrist section is a D-Ring which allows for attachment directly to the carabiner on gym equipment. Active Hands D Ring Exercise Aids are available in a standard size and a large size. Most adults find that the Standard size fits them, however D-Ring Aids are also available in Large. To determine the size needed, measure the circumference of narrowest part of the wrist. The Standard size fits 5.3 to 7.5 inches, and the Large size fits 7.1 to 8.7 inches. Active Hands D Ring Exercise Aids Specifications: Includes: One pair. Choose: Standard or Large size. Standard size fits: 5.3 to 7.5 inches wrist circumference. Large size fits: 7.1 to 8.7 inches wrist circumference. Color: Black. Care: Machine washable.