In an attempt to use every available surface (as requested by Mr. Smout http://www.thingiverse.com/Smoutech/designs) the original Thread Gauge Cone (http://www.thingiverse.com/thing:153820) has been reworked to include a gauge (or driver?) for hex bolts on the base. The top has an 7mm hex hole for 1/4" socket adapter, or whatever you desire. Hex sizes in base are 0.5mm over size shown. Diameter slots around edge are 0.25mm over size shown. Thread pitches are as shown. Comments and suggestions for improvements are always welcome!