At the time of writing (11/29/2021) this seller on Revain is only selling you a regular screw that doesn't work; It's technically called a 'set screw' because it 'installs' everything you want to assemble. The real part should have a connector on the end as shown on the Revain product page to access the faucet lever. The photos I have included show a set screw that I myself received prior to this purchase to attach a Moen faucet handle placed next to a set screw that just arrived (in an unopened box). You can see it's identical and I can assure you it doesn't work. You can easily see that the screw in the unopened packaging is very different from the product shown on Revain (and elsewhere on the web if you search "Moen 155023" which is the part number for the set screw).
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