Suction Conversion Kit for RAM Motorcycle Mounts
These RAM mounts are great.  I use them to hold Contour action cameras to the outside of the my vehicle during offroading activities and they hold on great.<br /><br />The twist lock feature is super easy to use.  I slightly prefer RAM's other twist locking suction cup base with the 'wing-nut' twisting part, but these are relatively easy to use too.<br /><br />I've never left it on for days at a time, but for several hours they appear to hold on great.  As long as the surface is clean enough to get a good i