Smartphone Clamp is a universal smartphone holder which can attach to an iPhone 5 sized device up to a 6s Plus. Most phones with battery cases are also compatible. Quick and easy installation by squeezing the rubber tipped X shape and releasing on the phone. 1/4-20 hole in the back for attaching to Magic Arms, Ultra Arms, and other devices. M3 hole pattern for attaching to the V-Lock Base Station And Wedge Kit which is great for attaching directly to a camera body.