This item is a spring cord lock set, manufactured with metal materials, so that it can serve you for many years. Metal material that can ensure its durability and practicability. It is widely used in all kinds of items which has rope or cords. Features -Color:Black -Material:Metal -Size:1.50X1.20X1.00cm/0.59X0.47X0.39in - Wide application: this cord lock is suitable for a variety of DIY rope products and many scenarios. - You don't need to worry the shoe laces being loosening frequently. It can keep your shoelace tight. - They are perfect for shoelace, elastic cord, finer cords, pull cords, draw cords, wet cords, etc. - These are great for use on sweat pants or hoodies to keep from losing the drawstring and to tighten the cord as well. - With rationalized dual holes structure design, easy to install and detach. Package list: 10 x Cord Locks