A:
The sizing given is normally matched to the shaft outside diameter (OD). So the Easton Axis HIT inserts are normally said as 9/32", which is the OD of the AXIS shaft. Normally if you want to know the OD of the insert, or inner diameter (ID) of the shaft, you have to reference a chart supplied by the manufacturer.
Answered on 10/7/2010 by Johnathan Karch from 3Rivers Archery