The Powerbuilt 1/2 Inch Drive 3 Inch Extension is the perfect socket extension. It’s made from high-quality Chrome Vanadium steel with a mirror polished chrome plated finish for durability and long tool life. Extensions are perfect solution tools for when accessing hard-to-reach places like when working in and around engines, under the chassis, or any other jobs that require a longer reach in a tight space. Each extension features knurling on the center of the shaft for a secure grip to allow for quicker rotation when tightening or loosening fasteners. No need to worry about dropping sockets into narrow spaces the Powerbuilt extensions also feature spring-loaded detent balls to help lock into and secure the sockets for worry-free retention.