The spatula-rule is intended for application to large surfaces and subsequent leveling of various types of plaster mixtures. The tool is of increased strength, the blade is made of stainless steel, hardened, fixed in an aluminum profile (patented by OOO “INTEK”). Due to the properties of steel and the characteristics of the aluminum profile, the tool has high rigidity, increased reliability and durability, and the risk of deformation and curvature of the tool during the work is reduced to a minimum.