The HDMI Cable Clamp Lock is specially developed for the SmallRig cage 1982 / 1660 (for Sony A7II A7RII A7SII), Cage 2087 / 2098 (for Sony A7RIII / A7III), also compatible with SmallRig kit containing cage 1894 / 2014 / 2015 / 2103 Secure tightly with 2 1/4'-20 screws, unsmooth surface on the clamp opening could increase the friction to keep the cable from falling off This HDMI data transmission Cable Clamp provides 2 M5 threaded holes for attaching screws for locking USB Cable The wingnut is made to help you tighten the HDMI cable and prevent from accidentally dropping. It could be adjusted by stretching if the wingnut block your device Friendly 24-hour Customer Support, 30-day No-hassle Return Service, Worry-free 2-year Warranty