The Stone Edge Surfaces Decorative Concrete and Concrete Overlay Mixer from Unitec Eibenstock, has powerful features that Make this the Best concrete overlay and decorative concrete mixer for the Construction Industry. Featuring Soft Start and Variable Speed switch for less splashing and better control. High-torque Motors with Specially Designed Gears – provide maximum power. Mix quantities from 1 gallon to 290 pounds, including concrete, aggregate and other materials. Our mixers also include a Helical Paddle – Mix from the bottom up, eliminating injection of air for an optimum blend.