Can any one please know the name of this extension!

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i work in floor generator extension and its so great ,but sometimes it creates the tiles with reverse faces ,i have searched a lot to solve this problem and i see a video they are using this extension and it work for them ,
so , can you please help me !!

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It’s V-Ray Utilities that comes with V-Ray Next. Can you post link to video and time stamp to where they used this?

thank you so much for helping me out .
here is the video : https://www.youtube.com/watch?v=i-NymrlTVIw&t=1607s
at 21:39
and just one more question please ,the v-ray they are using is 3.6 ,mine is 3.4 and its not coming with v-ray lighting and objects !
is there any chance that i can have this ??