Gehman Artifical Slings are manufactured from composite nylons. The Cuff can be adjusted to the size of your upper arm with two lock-screws on the inside which pass through the sling – and a buckle on the outside.They come with a micro-adjuster for getting the precise length from arm to the rifle. Micro adjustments can even be done while in the shooting position.- Easy to use- Super Comfortable- Gehman Sling is one of the best in the marketContact us at 70822-33324, if the product is in pre-order status.