1、Excellent Stainless Steel Material: This pipe center locator is made of excellent stainless steel material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 2、Efficient And Practical: This pipe center locator is efficient and practical for setting centerlines, determining angles, locating internal points of pipes or tanks, marking butt joints, and more. 3、4 Inch Y Base: This pipe center locator comes with a 4 inch Y base with a manually operated hardened center locating pin that can be effectively marked by tapping the center locating pin with a small hammer or mallet. 4、Adjustable Disc Bubble Protractor: This pipe center locator comes with an adjustable disc bubble protractor for added accuracy, ensuring an accurate measurement every time. 5、Wide Application: This pipe center locator can measure tanks or pipes that are at least 1/2 inch in diameter or larger, and is a must have tool for pipe fitters and welders.