Features: Brand new and high quality It is made of precision machined black heat-treated chromium molybdenum steel with high strength, impact resistance and excellent durability. Black phosphate coating prevents rust and corrosion and helps to prolong tool life. The ball spring at the rod end and the anti falling bolt hole in the adapter can lock the plug in place to ensure safe use and prevent falling off. Available in 3 different sizes, 1/2 inch, 3/8 inch and 1/4 inch, you can choose according to your needs. It is widely used in various stages, equipment installation, factories, production lines, automobiles and various mechanical maintenance. Specifications: Name: Universal Joint Material: Chrome Molybdenum Steel Color: Black Type: 6.35mm, 12.7mm, 9.525mm (optional) Package Includes: 1 x Joint Sockets note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!