A quality set of EIGHT impact socket adaptors with a 1/4″ hex shank. Manufactured from tough Chrome Vanadium Steel (CRV) with a black phosphate finish for longevity and durability. Each has a sprung locking ball to ensure a secure fit for attaching the socket. Sockets can be used with drills, drivers, screwdrivers, etc. They have THREE head sizes at 1/4″, 3/8″ and 1/2″ drive. The 1/4″ drive are 25mm, 30mm, 50mm and 65mm in length, the 3/8″ drive are 50mm and 65mm in length and the 1/2″ drive are 50mm and 72mm in length. Black phosphate finish to help prevent corrosion.