AmScope FR-HGA3-84 Stereo Microscope Focus Block with 84mm Collar and 5/8in Mounting Pin

The overall quality of the item is good. The reason I had to order it was the the kit that I ordered from you with the articulating arm only is offered in the 74mm, I needed the 84, upon receiving the kit, I called and unfortunately am scope would not let me exchange the 74mm for the 84mm, unless I returned the kit I told the CSR you didn't offer the 84mm with the kit, so you see my dilemma so I had to spend more money to get what I need.

The part worked as described, but only in one direction.