I seen this on YouTube the other day. Its raining outside, wood stove is warm, good day for a project. This is so simple it only took me less than an hour to do. I'll just share the link for a better description. I made my pins 3 1/2" long so there would be more meat in the jaws of the vise. I never had a bolt that long so I used a pole barn spike & threaded the end.