Straight from Starrflight.com
New for 2011, Micro FOBs are designed for use with ALL Harvest Time Archery HT-1's and ALL Victory VAP.’s The Micro FOBs are for use with f/g nock arrows (NOT for use with unibushings).
If you are unsure of which FOB's (Micro, Standard or Axis) you should be using please see the sizing video sticky in the video forum on this site.
Thanks for your support and for looking into FOB's
Will