Flange Line Up Pins assist the pipe fitter in aligning flanges for welding quickly and accurately. It is available in both slide-locking, and wobble-nut models, and in Stainless Steel. It is used to separate pipe flanges. It set precise two-hole horizontal alignment for welding flange assemblies. The cone-shaped end piece automatically centers on the bolt holes. It fit bolt diameter 5/8″ to 1 7/8″. Expansion springs allow pins to give as flanges expand during heating. It has the slide-lock locking for fast set up and stainless steel standard. The Slide-lock locking ends slip on and off quickly and easily, and facilitates quick movement from flange to flange.It is used for maximum clamping power and hardened tool steel for long lasting use.