29Pcs 1/2" Socket Set, Drive Deep Impact Socket Set, Including 3 ", 5",, V Steel ?Size Included?The 29pcs 1/2" socket sets include 3pcs extension bar: 3" ,5" 10". 11pcs sae socket sets: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1". 15pcs metric socket sets : 10-24mm. Totally 29pcs. ?Material?The impact socket sets are made of high-quality chrome vanadium steel with strong hardness. The heat treated CR-V steel has better toughness, and its surface is coated with a black powder coating of rust prevention and corrosion prevention,which is highly corrosion-resistant. ?Corrosion Resistance and Durability?The surface of the deep-drawn sleeve is coated with manganese phosphate, which can extend the service life of the socket, prevent the socket set from rusting, and greatly improve the corrosion resistance and durability of the socket. ?Advantages? The dimensions on the socket are all high-contrast dimensions of laser printing, which are not easy to wear out and can be seen clearly in low light.It is convenient for you to work at night.The sockets are precisely dimensioned for use in all types of automotive or mechanical equipment.The 6-point design can effectively prevent the nut from wearing and slipping. ?Easy to Transport?Easy to Install?The deep metric sockets will be equipped with a heavy tool box for transportation, so you don't need to worry about the loss of spare parts on the road, which is easy to store and carry. ?Note?If you receive the sockets with protective oil, please be assured because it is a new set of sockets. This is a rust inhibiting oil used to protect the product. Please use it carefully. Due to shipping issues, the surface of the product may air-drying, so you can apply rust preventive oil to keep it shiny.