My camera is a Canon PowerShot SX 220HS magnetic feet and work perfectly.
To say, 3 screw heads are enough to keep your device upside down.
More impressively, it also takes on the refrigerator door although this position has a significant offset.
Fully articulated and have rubber rings on each ball is the perfect companion to hang around for pictures with long exposure time or just do it yourself with your photos.
But beware, if your device weighs more than 300 gr (my gun + battery is around 280 gr), I do not recommend this.
It is reserved for compact.
