OK Rap Device
I canyoneer a lot, and I bought one of these a few years ago off of SAC for $8 and it does what it is supposed to to, but I prefer the ones with the high friction end and a low friction end. My all time favorite ATC is the Wild Country VC Pro 2 Belay Device. If you are looking for a cheap, simple ATC then this is a good one to get. I lost mine a couple of years ago and I wasn't to sad about it.