A Chuck Key for a 13mm Key Chuck is a handy tool used to tighten or loosen the jaws of a drill with a 13mm key chuck. It features a compact design and is made of durable materials for long-lasting use. This essential tool ensures a secure grip on drill bits, enabling efficient drilling. To operate, simply insert the key into the chuck's keyhole and turn it clockwise to tighten or counterclockwise to loosen the jaws. With its straightforward and user-friendly design, this chuck key makes the process of changing drill bits quick and hassle-free.