Rugged and Durable The impact socket set, made from CR-V industrial-grade alloy steel, undergoes heat treatment processes such as high-temperature quenching and low-temperature forging, resulting in a hardness level of HRC42-48. Complete Specifications With a pro configuration of 13 pieces, this set can be used with electric wrench, impact wrench, ratchet wrench, rod bender, and other tools for automotive maintenance, equipment assembly, industrial manufacturing, power inspections, and more. Withstand High Torque The hexagonal socket design creates a gap between the nut and the edges during operation, preventing excessive friction and wear. It can withstand greater impact force and effectively remove bolts. Distinct Size Markings Using laser etching and rolling processes, the extra-large size markings on the sockets are clear and easy to identify even under various lighting conditions. The markings are also resistant to wear. Heavy-Duty Carrying Case The split-strengthened case ensures durability and is less prone to breakage compared to traditional one-piece storage. The portable design allows you to easily carry it for work on the go. Black Phosphating Treatment The surface of the socket has a dense phosphating film, which prevents external factors such as oxidation and corrosion from corroding the surface of the sleeve and prolongs its service life. Specifications Item Model Number: SS217813A Impact Sockets Set: 13 Pieces Material: CR-V Alloy Steel Hardness: HRC42-48 Product Size: 11.93 x 6.02 x 2.28 in / 303 x 153 x 58 mm Net Weight: 6.83 lbs / 3.1 kg Deep Sockets: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 21 mm, 22 mm, 24 mm Package Content 13 x Deep Sockets 1 x Toolbox 1 x User Manual