anyone know what grip this is?

https://preview.redd.it/26f6cxpom6lg1.png?width=470&format=png&auto=webp&s=06f097dbd7bb42cfd45b5cbe2921cec3f9260c55

New to camcorders, but I'm ordering some stuff off aliexpress for my jvc everio, and was wondering where i could find this, and if it was stable. thanks!