Curv-O-Mark Pipe Marker is an easy-to-use marking tool designed for pipe fitters and welders. It provides an economical measuring tool for setting center lines, establishing angles and marks for butt-ins, locating points inside pipes and tanks, laying out keyways, and measuring declivity. Standard size The Curv-O-Mark Standard #6 model may be used on pipes and tanks that measure 1/2 inch in diameter or larger. Accurate placement The center finder has a 4 inch Y-type head that conforms to pipe curvature for precise placement. Best operation Use this manual hardened centering pin angle finder with a small hammer or mallet to tap the pin in for the most effective pipe marking. Applications - Mark centerlines and angles on pipe runs during fabrication or installation to ensure proper alignment of butt joints. - Locate interior points inside pipes and tanks for drilling, tapping, or feature placement. - Lay out keyways on shafts or pipe ends and assess declivity or slope requirements for piping.