Tablet/reader/phone finger holder

Had problems gripping my e-book reader with a single hand. So I designed this thingy. Prints in place, has a hinge and a revolving disc; snaps back into flat shape, so it's very compact. You stick it using a double sided tape to the back of your e-book reader (or whatever else), put your hand through it, and you can safely hold it with a single hand. I've wrapped the holding part with some fabric bandages so that it's more comfortable for myself.