What are your favorite tools?

Do you have favorite tools that you can't live without? These are a few of mine. Although they may not be the conventional optometric tools, I still love them. I have a couple dental picks that I use for things like getting broken nosepad pieces out, getting ahold of the cord to remove it when rest ringing rimless frames, and getting in the knocks and crannies of a frame when needed. I love my awl that I picked up at the hardware store. It is great for getting screw holes to line up, especially when it's a spring hinge. You all probably have the other item pictured - the screw holder. I couldn't leave it out. It's been a lifesaver for getting ahold of those tiny nosepad screws. I'm sure you all have your own special tools too.