September 2012 Mystery Tool A
Unidentified. One reader believes it to be an insulator for electric lines, especially for trolley systems. Photo submitted by Chris Jerue, Cheney, Wash.
September 2012 Mystery Tool B
Disston D-17 handsaw used by framing carpenters as a crosscut and rip saw for fast, diagonal cuts. Photo submitted by William Olson, Rossevelt, Minn.
September 2012 Mystery Tool C
Unidentified. Photo submitted by Dale Brock, London, Ky.
September 2012 Mystery Tool D
Animal poke. Photo submitted by Steve Sylvester, Centuria, Wis. See patent 209,844 for a similar piece.