Here's some of mine. The Dremel I broke the pin that holds the chuck so you can tighten it, so I have to fiddle with it. The tool shop one only has two speeds, The silver one has only one speed, (nice and fast for sanding with disks or drums), the general one is very slow but works really well for drilling holes especially in plastic. The workhorse is the Foredom with the speed control foot pedal. That thing is at least 35 or 40 years old, runs like a dream, power for anything I can throw at it. My mother used it before I got it to do bird carvings. They all have three jaw chuck adapters on them for ease in changing bits, sanders, drills etc., purchased from MicroMark. The one I use the most? The battery Dremel. I think this model is discontinued, but I'll probably get a similar one to replace the one with the broken chuck pin.
. Educational requirements: college 4 years - dental school 4 years - orthodontic school 3 years. I was almost 30 years old before I got my first real job...
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He is awesomely skilled! I am a big fan of the Foredom machines. I didn't have a chance to work with the new electronic system, but the flex shaft machine was the only one I use for about 10 years. I had about 5 different handpieces but the one with a chuck (on your image) was the one I used the most. When the Buffalo was introduced, I tried it once and liked the shaft only, very flexible, but the motor produced more heat than a power 
