Boost productivity with automatic mixing. With the ToughTek CM40 continuous mixers, it's easy to improve your crew's production rates by automatically mixing pre-blended mortar products. Graco's continuous mixers eliminate the need to manually measure water into the mix. Simply set the water flow rate for your specific material, break bags of material into the hopper, and the system automatically does the rest. You increase productivity, get done sooner and boost your bottom line.