I present my Tool Ring XII.
It's features include:
A 1/4" hex bit driver,
#2 phillips driver,
And a 5.5 x 0.8mm flat driver.
The sizing of this ring model is 20.1mm internal diameter, a UK U 1/2 (US 10.5).
However the ring size can be scaled up and down pretty much indefinitely. If you would like a specific size then please send me a message or post the request below.
This model is designed to be printed in Stainless Steel or one of it's variants.
Although all care has been taken to ensure this model is correctly sized, due to variations in the printing process, some filing may be required to ensure correct fitment of the hex and drivers.
There are some more photos of this object and other examples of my work, both 3D printed and otherwise, on my 'Tofty' facebook page