This lovely, somewhat enigmatic tool is a heavy-gauge electrical cable stripper: my friend Chris found it on the street and knew just who to give it to. Each end is for a different diameter of cable: 1/0ga (the smallest), 3/0ga, 4/0ga, and 350MCM (the largest). You push the end of the cable in and then rotate the tool so the small chisel blade can cut away the insulation in a spiral.
Location: Box 37
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!