Flange Wizard 53076-M Centering Head Tools, 8" - 48" Pipe Capacity, Standard is backordered and will ship as soon as it is back in stock.
Designed to establish and mark a centerline at any angle around the circumference (inside or outside) on a pipe or tank.
Use it as a protractor level, or remove and use the hardened center punch for other marking jobs. Magnetic.