"M-D Building" Economy Square Notch Trowel Economy Trowel Square Notch 1/4"x 1/4"x 1/4" is used to spread thin set mortar when setting small format tiles. Features:- Contains ergonomic TPR handle and notches for specific tile sizes. Notch Size: 1/4" x 1/4" x 1/4" Professional tile install tool. High impact, one-piece m