Our contractor-grade QLT Economy Notched Trowels create an easy way to spread your material for your flooring and tiling projects. These trowels have a 9" x 4" or 11" x 4-1/2" steel blade design with a single or double notched style. EDI 18640, 15519 and 15518 do not have a 10° angle. Either of those options have a variety of notch shapes and notch sizes to choose from.