Martin 5-lb tool balancer in excellent used condition. The balancer's faded old label has been replaced and a replica box with the correct label is provided.

Note that the balancer's rewind spring mechanism is the same one used to power Martin automatic fly-fishing reels, as well as their dog exercisers, logger's measuring tapes and rewinding clothes lines.  So, if you are a Martin fishing reel collector, you should have one of these to complete your collection. If you are a mechanic or production assembler, this tool will take the weight of a 5-lb hand tool to ease repetitive assembly motions.