J.W. Winco GN2277 Bull's Eye Levels, Aluminum, Surface Mount, 0.67" Hub Dia, 0.98" Base Dia, Black

GN 2277 bull's eye levels with mounting flange are used to check the horizontal position of jigs, machines, devices, appliances and instruments. The spirit levels are aligned in relation to the reference surface so that the bubble is located inside the marking ring when the horizontal position of the contact surface is achieved.