Fully enclosed 1/2hp, 110v industrial grade motor with direct gear drive. Mix up to 275 lbs. of mortar, stucco, grout and concrete.
Descriptive video: https://youtu.be/6nJ88YOmhw4
How to mount the mixer onto its stand with two people: https://youtu.be/k9m8AzIDHco?t=107 ( the soundtrack is AWESOME! )