The All-in-One JB Jig is a must-have tool for any pipe welder. This unique and patented tool spins 2", 3", 4", 6" & 8" long radius pipe for roll welding. The one-piece, compact design allows for easy truck storage and eliminates the need for a separate jig for each pipe size, allowing you to be more efficient on the job. This *NEW* & *IMPROVED* version is foundry poured. Which eliminates all imperfections and ensures that the JB Jig spins true every time.