Garmin RCT 715 Strap Mount system - 3D printed
 
The mount locks into place with two sprung loaded buttons at oposite angles for a secure and stable hold. 
 
The mount requires the insert to be changed which is very simple, undo the bolt remove the orginal insert and replace with the new one. 
 
The RCT 715 lanyard is discounted when purchased with any RCT 715 Mount