Bob Poole of Winnipeg writes, “I was visiting the firefighters museum the other day and one of the long-retired firemen, Lloyd Stankey, was asking if anyone knew what this object was. It’s about five inches long and one inch in diameter. The bolt with the ring on it is moveable, but doesn’t come out. Please help!”
Submit your answers in the comments below or by sending it in through Our Canada’s submission site (please identify it is an entry for What Is It).