Jackson® Curve-O-Mark® offers a full range of leveling tools and flange aligners designed specifically for professional pipe-fitters, steel workers, and electricians. 360° adjustable dial bubble protractor with dual 90° quadrants delivers fast, precise angle measurements for improved accuracy and alignment Two integrated 25 lb. pull magnets securely attach to steel surfaces for stable, hands-free use during layout and setup Durable cast aluminum construction provides lightweight handling while standing up to demanding jobsite conditions Ideal for pipe fitters, welders, jig builders, and fabrication professionals who require accurate angle determination