I was doing cement work last weekend in my basement and was breaking my back trying to mix cement in a 5 gallon bucket. I knew there had to be a better way to do this. So I went to my dad's and borrowed a large drill bit he bought to mix paint. It was metal so I didn't think it would break from my use, and in fact I think it was probably made to mix mortar (as seen in the picture above). The bit worked great. It basically looks like a larger version of the same utensils you use with a kitchen mixer. Since all of the force is horizontal the cement won't splash out (unless you get really crazy). My 18V cordless drill was strong enough to do the job on the low gear setting, however I wore through the batteries much faster than I could recharge them. So I used an electrical drill and it worked much better as it had a handle on it for my left hand to hold. It seemed to work best if I put the water in first and then added cement gradually to get the right mixture.