Dasqua 8″ Square Precision Level ~ Graduation is 0.005″. ~ Lapped, hardened and polished steel body. ~ Highly sensitive and easy to read glass bubble. ~ V-groove on base for use on round bars and shafts. ~ Robust, cast iron steel with a precision ground measuring surface for high accuracy. ~ Strictly made in accordance with DIN877. ~ Can be used to measure the angle of inclination, flatness and straightness of machine guide rails and the horizontal and vertical position of equipment during set up. ~ Insulated handles on the housing and protective glass over the vials.