Hold a caliper and 3 hex keys neatly on the front of the makerbot. Now I can find them!Everyone needs a caliper. Much easier to read a digital display than guess fractions of a mm. The hex keys come with the makerbot. Seemed a good holder to put them all together in one place.In addition to the above, I have a small holder for a craft knife and a tourch. Might draw them again, but didn't keep the STL's.This was my first go at using Solid Works. Far easier than expected! :)Print then clean out the holes with a drill: 3mm for the top holes and the one at the back 4mm for the hex key holes 6mm most the way through from the frontFix to makerbot with origional nut and screw, then drill additional holes and fix.