The set includes 3 universal sockets with available sizes; 6.3mm/10mm/12.5mm (1/4 inch 3/8 inch 1/2 inch). Also works in confined areas or obstacles, allows easy access to hard-to-reach fasteners. Our socket joints will easily convert to four directions freely, the 90 degree swivel head locks onto the socket and guides the pole for quick and easy use. Each socket is equipped with a spring-loaded ball on both ends to lock onto the sockets and allow the tools to engage securely, preventing them from falling out. The job will be done as quickly as possible by using the right joint set to get your nuts and bolts. This universal joint cardan set is suitable for all four-hole square groove hexagonal side handle, which is used for repair, car modification, wrench socket transformation. It is applied to the vehicle transmission.