This concrete machine automatically mixes concrete to your desired consistency and turns small to medium (and even moderately large) concrete pours into very manageable one-man jobs. You simply connect a power source and a garden hose, select your desired consistency using the dial, crack a bag into the machine, and turn it on! You put the bags of concrete in and it will automatically mix it and sent it down the chute. It is rated to do 40 bags of concrete per hour, so driveways, porches, and other slabs are a breeze and can literally be done with one man. I have a hopper that will allow 4 bags at a time to be put into the machine (additional rental cost for the hopper).