MULTI-SPECIFICATION SET: Our socket adapter set includes the following specifications: reducer-1" F to 3/4" M, 3/4" F to 1/2" M, 1/2 "F to 3/8" M, 3/8" F to 1/4" M; adapter- 3/4" F to 1" M, 1/2" F to 3/4" M, 3/8" F to 1/2" M, 1/4" F to 3/8" M. Each product is labeled and has clear laser markings on the surface for easy identification and management PREMIUM CR-MO MATERIAL: The socket adapter is made of heat-treated forged Chrome Molybdenum Steel, it's corrosion-resistant and has ultra-high hardness. The thicker wall design can handle higher torque and prevent breakage PREMIUM COATING: Our socket adapter set has black manganese phosphate coating on the surface. Black manganese phosphate coating is a quality corrosion resistance and rust resistance function, reduces friction with other fasteners and ensures maximum durability SPRING BALL DETENT: This impact adapter set is equipped with a spring ball detent, ensuring a tight connection with the socket. The pin hole is located at the bottom to connect with the spring ball detent of the wrench. Reinforced at both ends, you won't have to worry about falling or loosening issues, ensuring safety and efficiency WIDE APPLICATION: Our socket adapter set solves the problem of tool size conversion, enabling you to work with nuts or bolts of various sizes. In addition to the socket, the adapter can also be attached to other tools, such as universal joints and extension bars. The complete drive size makes it suitable for most tools and brands, such as power impact wrenches, cordless impact guns, socket sets, and other impact tools BLACKROBOT Impact Socket Adapter Set 8PCS, 1”3/4”1/2” 3/8”1/4”Square Drive, Reducer for Impact Driver Wrench Drive Conversion, Cr-Mo Steel Exceeds ANSI Standards with Portable Case