I just checked some of my small wrenches and found 2 of these wrenches.
both have 10 grooves/flutes on the handle.
both are 5 1/2" long closed
" NO MARKINGS" FOUND using an old weighted base, lighted inspection magnifier. plus, as needed ( my glasses)
while having both wrenches apart in 3 pieces each,and as one was shiny and the other was not cleaned yet, I played around with
mixing the parts. they were very much interchangeable.
has anyone located a patent on this wrench ???