The design allows for straightforward installation, enabling users to quickly secure the scooter ' s folding mechanism The scooter shafts locking screw is with the installation accessories Make from alloys, the internal latches screw is builted to bear wear and tear, providing great durability and reliability over time Specifically designs for 30, perfectly fit and great for your electric scooter By replacing the inner latches screw, and can maintain the scooter ' s locking and folding capabilities