Powerbuilt universal sockets are perfect for the professional and serious home mechanic. The 10-piece metric Universal Socket Set is made from high-quality Chrome Vanadium Steel and features a mirror-polished finish for long-lasting tool life and durability. The high-visibility size markings are forged right into each socket sidewall and will never fade or wear off. Powerbuilt universal sockets feature our innovative Z-Drive design which allows better grip on the fastener giving more control and reducing slippage. The universal joint design makes for quick and easy access to even the hardest to reach fasteners while the precision chamfered openings make it easier to slide the socket over the fasteners. 10 piece 3/8-inch drive socket set includes interchangeable clips and a steel socket holder rail for easy organization and storage.