3/8 Female x 1/2 Male Adapter Extension is made with a locking pin Made of high quality steel (chrome-molybdenum)Tested to the highest specifications to deliver outstanding performance at the most competitive cost Lifetime Warranty This 3/8 drive adapter has a Locking Pin retainer, 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.
