The 25mm Square Nickel Concho is a decorative embellishment commonly used in leathercraft to add a touch of style and sophistication to various leather items such as bags, belts, and jackets. It is made of durable nickel material that is resistant to corrosion, ensuring that it can withstand exposure to the elements and heavy use. The concho measures 25mm in size and features a square shape with a screw back fitting that measures 25mm x 25mm. This screw back fitting allows for easy installation and secure attachment to the leather item. Overall, the 25mm Square Nickel Concho is a stylish and functional addition to any leathercraft project.