What is the minimum amount of space between adjacent teeth for insertion of the Screw ReDirect?

The Screw Redirect is designed to have as minimal a rotational diameter as possible to facilitate placement between adjacent teeth. The rotational diameters are as follows:
3.7mmD Screw Redirect = 5.7mm
4.7mmD Screw Redirect = 6.7mm
5.7mmD Screw Redirect = 7.7mm
Watch video here :