There are typically two ways this version is packaged:

Here's a breakdown of the main reasons someone would use it:

Multikey 18.1.1 is most prominently associated with the Mastercam suite of Computer-Aided Manufacturing (CAM) software. It has been widely used to emulate the Sentinel HASP (Hardware Against Software Piracy) keys required by various versions of Mastercam, including versions 2020 and 2023.