Snap-On Dial Gauge holder for Prusa I3 Zonestar P802Q, P802N and others

You can watch a video how it works if you look in the "Thing Files" tab above (open with VLC).

The holder is designed to connect cheap chinese dial gauges like this one http://www.ebay.de/itm/191381928182?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT to the extruder, to achieve a very accurate bed leveling in a short time without any electronics.
After the mount is added, the dial gauge can be very easily removed and added within seconds simply by pressing/jamming it inside(no