12 Extension Made of high quality steel (chrome-molybdenum) Extension is made with a locking pin Tested to the highest specifications to deliver outstanding performance at the most competitive cost Lifetime warranty This 3/8 drive, 12 extension features the locking pin, which is a socket retention device. A spring loaded pin, simply line up with socket retainer hole and press pin. to release socket, insert object through the retainer hole and press pin.
