HP 918394-001 kickstand is a replacement support part for the HP Pro x2 612 G2 Tablet. It props up the tablet and can be positioned at a desired angle for use, including when the tablet is connected to an optional keyboard.
The service guide identifies this part number specifically for the kickstand. Installation uses four Torx-5 screws to secure the kickstand assembly to the computer. The guide lists the hinges separately as part 918904-001, so they are not identified as part of this kickstand listing.