Black color high-quality genuine buffalo leather. Adjusts from about 32 inches to about 40 inches.1.25-inch-wide leather gun strap. Solid brass Chicago screws in a silver color finish. Stainless steel all metal sling swivels are included. Handmade one at a time in our shop in Detroit, Michigan. No machines are used in the process. Each sling is cut and the holes are punched using hand tools. The edges are beveled and burnished by hand. The leather surface is finished with a formula containing natural oils and beeswax. Check out our Amazon store to see all of our products. A note about our sling swivels: The nut is free spinning, which means that when the nut is tightened to close it, the nut will spin freely until positively engaged. In other words, the nut is not supposed to tighten down. That is an intentional product design to help prevent accidental opening.