Bought this at a swap meet this weekend. It seems to be a substantial 5/16" 6-point hex driver with a retaining function. Overall length is 13-3/8 inches.
The spring-loaded outer shaft sleeve pushes forward to allow the bolt/screw to be inserted.
To me, based on materials and construction, it looks like something made in the 70's, plus or minus a decade.
I've done a patent search for RIM TOOL and for C&H but had no luck. I can't find a similar manufacturer name in the GJ list.
Any idea of its use, or who C & H is/was?



The spring-loaded outer shaft sleeve pushes forward to allow the bolt/screw to be inserted.
To me, based on materials and construction, it looks like something made in the 70's, plus or minus a decade.
I've done a patent search for RIM TOOL and for C&H but had no luck. I can't find a similar manufacturer name in the GJ list.
Any idea of its use, or who C & H is/was?



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