1. Pipe Gauge: This easy to use marking tool, designed for pipeline jaws and welders, is an efficient measuring tool for setting centerlines, establishing butt angles and marks, locating points inside pipes and tanks, laying out keyways and measuring inclinations.2. Safety Standards: When it comes to providing innovative safety solutions, welding tools offer unmatched functionality, lasting value, and comfort at work. 3. Y Head: The center finder has a 4in Y type head fitted with an dial bubble protractor (DSL), simple, quick and easy to use. 4. Must Have Tool: This pipe center finder tool is an easy to use must have for pipefitters and welders to help better perform measurement tasks. 5. Prime Material: This pipe center finder tool is made of premium stainless steel material, Long lasting and not damaged, bringing a good experience of use.Item Type: Safety Pipe Marker Centering Tool Step 1: Loosen/tighten the hexagonal nut with tho included hex key Hex wronch : Place on the pipe and find the angle you want Step 3: Push the center column down to the fixed point position Step 4: Some tapping with a hammer to leave a fixed point mark Colour:silver Material:Metal Package Contents: 1 x Pipe Center Finder Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.