I like WadePatton's (?) comment about the left hand drill bits. Before I retired and started working on firearms, I built airplanes and race cars for a hobby. Lots of places on fast little cars and airplanes where you cannot go RIGHT, and have to go LEFT!
Consequently, I have left-handed drills, taps and dies. And since I have ALL my smaller taps in one bin, I do need to use caution when selecting one for use. No mistakes yet, thank goodness!
Aviation Spruce is a great source for things such as this. I also get 1075 and 4130 steel from them. Handy stuff to have around!