Features: ▪️It fits children's bicycles sized 12-20" so that you can move them from bike to bike as your kids grow. ▪️It ensures your kids' safety and prevents accidental injuries when learning to ride. ▪️Providing more confidence for your kid to learn to ride bikes while they know they are safe, which enhance their learning efficiency. ▪️Fittings are supplied for easy installment. ▪️Strong metal supports to give extra stability and security.