The XL Combo Mount's purpose is to hold a Garmin computer on top & an action camera underneath. Using a technically advanced locking system & a proprietary co-polymer interface, you get a truly definitive clunk, when you have twisted your Garmin into the locked position. The insert has been designed & extensively tested for the purpose of breaking away prior to your computer body tabs in an emergency situation; saving your computer & action camera from damage due to impact.