Vintage/Antique 18 Inch Drop Forged Steel Pipe Wrench Monkey Wrench heavy. There is no markings on this wrench whatsoever that I can see the base my research I'm beginning to think it could be as early as the late 1800s but I cannot confirm that for sure. What's unique about this ranch the bottom jaw is the one that slides normally it's the top job I find that interesting. I believe that is why it opens up to four inches this is a very heavy rancher weighs 9 lb and is completely working condition I cleaned it up and oiled it and it works with ease great for any collection if you look at the close-up pictures of the handle it appears that a must back in the day had a wooden handle which probably was the manufacturer's name on it it looks like there's some broken wood inside the top of where the handle should be it's pretty cool.