It’s without a doubt the most useful tool I have ever made. Perfectly tangent, repeatable cuts. I’ve used it on every exhaust I’ve built for the last 10 years. For use with 2,3,4” center line radius 1-3/4 tubes. You weld together but everything is tabbed and slotted and requires no measuring to assemble. Works with bandsaws with tables up to 22.5” wide (or wider with modifications). Throat depth minimum 6.5”. Includes miter block for saws with miter grooves in the table.