[Excellent Function] The pipe center finder is designed to assist users in accurately locating the center of a pipe or cylindrical object. This feature utilizes a combination of visual cues and measurements to determine the precise center point of the pipe, aiding in tasks such as drilling, welding, or installing fixtures onto the pipe. [Wide Application] This tool is used to measure pipes from 1-1/2 inch to 6 inch in diameter. It can be used to set center lines, determine angles and marks for butt-ins, locate points inside pipes or tanks, align keyways, and calculate inclinations. Ideal for pipefitters and welders, it makes positioning work more efficient and saves time and effort. [Easy to Use] 1. Adjust the hexagonal nut with the included screwdriver. 2. Place the pipe marking center tool on the pipe and move to achieve the desired angle. (When the dial is set and positioned in the center of the green indicator, ensure the green indicator is level.) 3. Push the center column down to the fixed point position. 4. Tap with a hammer to leave a fixed point mark on the pipe. [Durable and Sturdy Material] Made from highly flexible, heat-resistant materials and high-quality metal raw materials, this pipe center finder can withstand demanding usage conditions and provide long-lasting performance. [Adjustable Dial Bubble Protractor] This magnetic protractor angle finder comes with an adjustable dial bubble protractor (DSL), allowing you to adjust the center column to your desired position. Colour: Black + Red Material: Iron Package Contents: 1 x Pipe Center Finder Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.