The BAUM VANOS Wrench - 115490 is a specialized tool designed for use with VANOS systems in BMW vehicles. It is used to loosen and tighten the VANOS unit's central bolt, which is necessary for performing maintenance and repairs on the system. This wrench is specifically designed to fit the unique shape of the VANOS bolt, ensuring a secure and efficient grip. It is made of high-quality materials and is durable enough to withstand frequent use. This product is an essential tool for any mechanic or BMW owner looking to properly maintain their vehicle's VANOS system.