Netsuke +Opening Tool for Apple iPhone 4 4G
There don't seem to be many iPhone phone strap holders but that's ok because this one would beat them all anyway. It is very minimalist and looks very natural on the iPhone and is unobtrusive so the dock cable inserts easily. (I have mine on an iPhone 4S, works great). It includes extra screws for attaching it just in case you lose a couple, and a very nice double ended screwdriver for removing the standard iPhone screws and inserting the new ones, and it's even magnetized! The only downside of course is th