The EZR 21 S dual-paddle mixer is quick and efficient when mixing heavy products such as mortar. The blades rotate in opposite directions, eliminating counter torque and making the unit easy to handle. Galvanized steel paddles mix the product from the bottom up to prevent air bubbles. The mixer can handle up to five bags or 25 gals. of material/hour. CS Unitec Inc. 800-700-5919.