Been using the Losi Drivers for a while. Replaced a tip or two but on the whole I like them a lot. I've got both the std and metric sets.

http://www.dynamiterc.com/Products/D...ProdID=DYN2904

I have had great success w/ these. Tips hold up good and last a long time. The handle is big and knurled enough to get some good torque and repalcement tips are only $3.50 at my LHS.:018: (although I haven't needed one yet in 4 months) Got the whole range of metric and SAE. Only wish I have for them is that they had diferent colored handles for easy identification.

I was using a set of craftsman hex drivers, but they didn't last much better than the plain old hex keys.