Good unit but locking tab was installed on wrong side of stem. In the picture, most of the gold bar is under the bar. This setup only assembles one way, so you can't just flip the expander head. I had the job to do so I had to buy a punch small enough to put the locking pin in so I could take the tab off the bar and install it properly. works now but there is no locking pin to prevent the tab from slipping off and being lost. Suppose I'm stuck with this as I had to change it to get my job done without waiting for a replacement.