It's proven robust and reliable on and off the beaten track.
I've never been able to shake mine free despite a few falls on the dirt.
Here's what Quadlock reckon
Quad Lock® is the strongest, most secure and most convenient mounting system that integrates your smartphone into an active lifestyle. Quad Lock® by Annex Products is developed, owned and operated by Australian Startup Annex Products based in Melbourne. The patented Quad Lock interface allows our mounts to be smaller and more secure than others on the market.
What you will need