Last week, I asked you all to take your guesses at what this is:
As much as I want to claim that it's a tiny brass mook jong training dummy for my army of miniature Bruce Lee clones, it's not yet April 1st. In actual fact, it's a hole borer for rubber stoppers. The bottom has a mildly sharp edge, the inside is hollow, and you can press down on the arms and turn.
I use this most often to create through holes for sampling and feed lines in bioreactors. A few other uses for it in a microbio lab are to cut out little coupons of solid substrate and make agar plugs to test the effects of various chemicals (often screening for inhibition) on microbial lawns.
The post hit a little over 1 SBD, so that's two sweet, sweet 
Congratulations to 
