Curv-O-Mark® DSL Adjustable Bubble Protractor helps pipe fitters, welders, and fabricators quickly measure and set angles for accurate layout and alignment work. Featuring an easy-to-read adjustable dial, it provides precise angle measurement and setup for a wide range of fabrication applications. Adjustable bubble protractor helps accurately measure and set angles for layout, fabrication, and alignment tasks 180° measuring range across two 90° quadrants provides versatility for a wide variety of angle measurements Graduated in 2.5° increments for precise angle setup and repeatable results Bubble level cast into the aluminum dial allows quick visual reference for efficient measurements Compatible with multiple Curv-O-Mark® layout tools for added flexibility on the jobsite and in the shop