A masonry trowel is a tool that is used to apply, spread, shape, or smooth mortar, plaster, concrete, or other materials on a surface. Masonry trowels can have different shapes, sizes, and materials depending on the type and quality of the material and the effect desired by the user. Some common shapes are London, Philadelphia, margin, gauging, pointing, corner, and finishing. Some common sizes are measured by the length and width of the blade, ranging from 5 inches to 12 inches or more. Some common materials are steel, carbon steel, stainless steel, plastic, and wood. Masonry trowels can be used for various purposes, such as laying bricks or blocks, repairing or installing walls or floors, applying or smoothing stucco or plaster, and creating decorative effects. Masonry trowels need to be cleaned and stored properly after use to prevent corrosion and damage.