RAM-Mount modules come in five sizes, with ball sizes B (e.g., for the aiShell mini) and C being the most suitable for Shell cases. The latter is larger and more robust. They can be connected to the Shell either directly or through one of the available mounts. The mounts have a hole pattern that fits both B and C ball modules. For vehicle mounting, special solutions are sometimes required when, for example, no holes can be drilled. This is where 'No-Drill' attachments are especially useful.