The Cose Metal Half-Ring, 19mm in diameter and made of copper, is a crescent-shaped metal piece with a straight bar, used to attach handles and straps to bags, backpacks, and accessories, allowing the straight bar to be sewn directly onto the fabric or leather. The copper finish provides a warm and distinctive touch, making it a popular choice in more vintage-style leather goods. It is an essential accessory in leather goods for creating strong attachment points where the handles connect to the body of the garment.