https://techschoicetools.com/produc...double-joint-3-8-square-length-65mm-z-series/
https://techschoicetools.com/produc...double-joint-1-4-square-length-46mm-z-series/
I can see these being quite useful for spark plugs (3/8") and for hard-to-reach specialty fasteners (e.g. torx, triple-square) where swivel sockets do not exist. The prices seem reasonable as well. Does anyone have experience with these? @Sam_Julier ?