The edge clamp is great for the house, school or industrial applications where you need to mount a smart-phone or tablet. The clamp expands out to 1.75" and can be attached to any edge that is 1.75" or less. It does not have to be a desk, could be a cart.

The holder is very flexible and can handle any smart phone from 4" up to tablets to 12.9" viewing angle. The feet expand to leave free access to all ports for phones and tablets for charging.