On occasion I need an anvil and I had been using the small one on the side of a bench vise. I have a friend who is still working for the railway, so he got me a small piece of rail. Rail is classified by lbs per yard so this is 139 lb rail. This piece is about 9 inches long. I smoothed the ends with a miter saw, then cut 14 pcs of 5/8 inch plywood in the shape of the profile of the rail and glued them together and attached 4 bolts for the handles. Now if you slide the rail in upright you have a rounded surface, and when you turn it upside down you have a large flat surface. Its sure not a good looking build but it sure makes a good anvil. Thank you for looking.