Product review (5 stars): Replaced coupling for minimal cost vs. replacing blender
This little part was all that was needed to fix our blender.  It is a hassle to remove.  In retrospect, wish I had added the little removal tool.  Would've been so much easier to remove the old coupler.  If you take on the task with a screwdriver, just be persistent and push the handle up with much strength several times.  Don't give up, it does come off.  After my husband gave up, I tried it a few more times and it popped off.