• 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.