VINTAGE BONNEY CLUTCH HEAD SCREWDRIVER, MODEL No. CL7, USA MADE, 5-16, YELLOW HANDLE
I BELIEVE "5-16" IS WIDTH OF HEAD, BUT PLEASE DO YOUR OWN RESEARCH
USED, MARKS FROM USE, BUT NO PREVIOUS OWNERS ID MARKINGS.
CLUTCH HEAD SCREWDRIVERS USED ON Clutch head screws, which were probably the first type of security screw ever developed for commercial use. They are designed to prevent items secured with them from being easily removed or opened
TOTAL LENGTH: 10-1/2" APPROX.