I would agree here. I have a lot of Ryobi tools and they have yet to let me down. I have owned their cordless impact driver and drill for about 4-5 years and they have worked flawless, even after I have forgot and let them get a nice shower in the bed of my truck. I just upgraded to the large...
LPS KB 88 is the best I have ever tried, hands down! I promise you won't be disappointed. Prefer it over Kriol any day.
http://www.grainger.com/product/LPS-KB-88-1CMX3
Check out this study. It does not include the KB 88, but gives you an idea of readily available penetrates...