[Economic Measuring Tool] This pipe marking centering tool is effective for setting centerlines, determining angles and marks for butt joints, locating points within pipes or tanks, arranging keyways, and calculating slopes. It can measure tanks or pipes with a diameter of 1/2 inch or larger. [Durable and Sturdy Material] The pipe installation tool wraps around the circumference of the pipe for measuring and marking. It is made of highly flexible, heat-resistant gasket material. This pipe center finder tool is easy to use and ideal for pipe fitters and welders. [Y-shaped Base with DSL] This tube center finder features a 4-inch Y-shaped base with an adjustable dial bubble protractor (DSL). The center post can be pushed down to the anchor point as needed. It is a valuable addition to any pipe welding toolkit. [Adjustable Dial Bubble Protractor] Featuring an inch scale and chart, this pipe installation tool helps draw straight lines around pipes. To check level, align the green liquid bubble halfway between the two lines on the protractor. [Easy to Operate] Step 1: Loosen or tighten the hex nut using the included hex wrench. Step 2: Place the pipe marking tool on the pipe and set to the desired angle. Step 3: Push the center column down to the fixed point position. Step 4: Tap with a hammer to create a mark on the pipe. Material: Metal Color: As shown Package Contents: 1 x Angle Finder Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.