I often weld 1" square tubing and needed a solid 90 degree angle next to the 6" frame arch to secure the corners for the weld. Not everything fits flat on the welding table, I can use F clamps or 2 spring clamps or C clamps with a vise which work very well. The only thing that needs to be changed is the 45 degree chamfer to clamp the inside corner. I can also add a flat plane to one side of the corner to provide an extra clamping surface. It pays to have everything you need for a clamping project in your toolbox.