A. This is a practical multi-functional pliers specifically designed for bicycle chain operations, and it's a good helper for mountain bike enthusiasts. It's the bicycle chain plier, which can also be used as a bicycle magic buckle plier, capable of easily performing quick-release buckle operations on mountain bike chains. B. This plier is made of steel, being sturdy and durable. It can withstand relatively large forces and is not easily damaged even with frequent use, providing long-term reliable support for your bicycle maintenance. C. It has an exquisite design and a small shape, belonging to the type of mini pliers, making it easy to carry. Whether you encounter chain problems during a ride or conduct daily bicycle maintenance at home, you can take it out at any time. It has diverse functions, meeting various chain operation needs. One tool can solve multiple problems, greatly improving the usage efficiency. D. In addition, although this plier is small in size, it has powerful functions. It can easily handle various chain quick-release buckle operations, making your bicycle maintenance simpler and more convenient. It can be said that it is a practical tool indispensable for every bicycle enthusiast, adding more convenience and fun to your cycling life.