This tube yoke adapter is designed to attach a 1480 weld yoke to a 2.5" OD tube. The most common use is in the front driveshaft of a rock bouncer or high horsepower off road buggy.
Please note that due to the fact that the OD of a tube is the least controlled dimension by the steel mills, you will likely need to do some fitting of the tube OD to the adapter ID.