It's 1896, you and your pipe-loving home boys are out on the town and come across a 18in diameter pipe that is leaking. Luckily, you always bring your 140lb wrench with you everywhere, so you get to work. Within a matter of hours, you can lift the wrench up to the pipe and wrap the chain around to begin tightening. You and the boys all hang off the end of the wrench, feet dangling in the air, in order to get enough force to move this pipe. Unfortunately, it was a left-handed thread and you just unscrewed more, leading to the beginning of a mass flood even that will forever change life on this planet. Great job guys! I still don't understand how many people are needed to use this wrench. I have never seen a wrench so large that one person cannot operate it. This was made by the J.H. Williams & Co. and is the size No. 16. Based on the design and colour, I estimate this wrench to be from around the 1910s.