The ZWO TH10 quick-release plate with 3/8" screw enhances the stability of the telescope mounted on the TH10 head.
The standard TH10 quick-release plate features a 1/4" thread, enlarged to 3/4" with an adapter to accommodate Seestar telescopes. This quick-release plate has a 3/8" mounting screw which, according to the manufacturer, improves the stability of the Seestar telescope in equatorial mode.