These feet would be fine if it were not for the problem of no harm machined screws to mount the spikes. I already had the same problem with Nexus 6i. It seems that indeed that is a widespread problem on Nexus because we find the same type of complaint on other sites selling online I contacted Atacama in England that I immediately offered to send me a bolt to aim for the thread without distorting. Despite this, I had to tinker for a good hour with the said bolt + key 10 + pliers to finally get to properly aim the tips (and I beg you to believe that although I'm not a handyman Sunday! ) In short, the design and machining of the decoupling tip portion is very weak What is totally unacceptable for a device manufacturers high-end audiophile!
Finally, we can also add that these feet can (and should) be weighted with sand or very expensive Atabite Atacama but the filling in the center column is not really easier One even wonders if it was really intended for despite the manufacturer's claims
To sum up, a foot model certainly beautiful but really poorly machined and poorly designed ...