Speaking of grinders with paddle switches and safeties in another thread, I got tired of a corded DeWalt 90 degree angle drill that has a wraparound body trigger. When you lay it down, it will activate. There is no good place to grab it for a bit change and it's a must to unplug it when you do. No on the fly bit changes. So I picked up a Milwaukee cordless angle drill. Straight finger trigger on it. Keyless chuck. Better directional switch, too. And, it can fit in to tighter spaces!!
Also, I picked up a neat set of relay bypass tools. Basically for diagnoses or triggering a relay manually. These things will plug in to a relay socket, and they have an on/off switch on top of them. Much better than guessing/using a jumper wire! So, the next time my GM F.I. fuel pump stops working, I can plug this thing in place of the relay and it will help tell me if it is the pump side of the system or the relay side of the system. (Hint, more times than not, the fuel pump goes bad. It does live in a pretty crazy environment!)