This ergonomically designed Socket Bit Set, made from heavy-duty chrome vanadium steel, contains 41 different-sized pieces. It is a great helper to some garages or workshops. Professionally heat treated chrome vanadium steel brings the set strength and durability. A storage case is included in the delivery for organized storage and easy portability. And sizes are all stamped for easy identification. With this socket set at hand, you are able to deal with repairing work with ease.