The Simson Universal Ring Lock is a versatile bicycle lock that can be mounted on almost any frame. This lock comes with two keys and has a wide opening of 57 mm, making it suitable for mounting on wide mudguards. The Simson Universal Ring Lock is made of sturdy steel and plastic and weighs 660 grams. With this lock, you can securely lock your bike and protect it from theft. Product specifications: - Ring lock - Includes two keys - Wide opening of 57 mm