The BAUM N73 Valvetronic Drive Socket - B117270 is a specialized tool designed for use with the BAUM N73 Valvetronic Drive system. It is used to securely connect and drive the Valvetronic motor, which controls the variable valve lift in BMW engines. This socket is made of high-quality materials and is durable and reliable for repeated use. It is an essential tool for any mechanic or technician working on BMW vehicles with the Valvetronic system.