Button Head Coupler, Female Female, 1 8 in, Giant pull on type ORS NASCO workers benefit from less hand workers benefit from less hand fatigue and greater productivity while performing detailed tasks to heavy duty jobs Lining treated with Actifresh to reduce bacteria buildup One piece Y shaped body design with magnetic legs Built in dial with 2 1 2° increments that turns 360° Hardened center punch marks set position by taping with a hammer Used to establish and mark a centerline at any angle around circumference on a pipe or tank or as a protractor level Excessive heat can damage magnets For use with hand operated grease guns only For use with button head fittings High quality to ensure durable reliable performance