3pcs Impact Universal Joint Socket Adapter Set Ratchet Swivel Socket Extension U-Joints Sockets 1/4", 3/8" and 1/2" Drive,Cr-V,Black

HIGH QUALITY:The Universal Joints are made from Hardened treated Chrome Vanadium Steel Alloy (Cr-V).Black phosphate coating protects against rust and corrosion maintain and elongating tool service life., EASY to OPERATE:The ratchet Swivel Sockets are added springs to the two fixed shafts in the middle, so that they can be kept at any angle without moving, more convenient and practical to use., PROCESS DESIN: Spring-loaded detent balls securely latch onto universal joint set, preventing them from being dropped during use,improve your work efficiency., OPTIMIZATION:The structure of the universal joints have been optimized,so they can works around obstructions to access hard-to-reach fasteners., INCLUDES：The universal joint sets are 1/4", 3/8", 1/2" in size and are finely machined to meet and exceed ANSI/ASME standards to ensure they will fit on any compatible tool.