This is my small one-piece driver/spanner tool with a number of different driver points:
6.5 x 1.2mm flat driver,
No.2 posidriv driver,
5mm hex driver,
4mm hex driver,
T25 torx driver,
1/4" hex bit driver,
13mm socket spanner.

An o-ring is required to complete the assembly to help hold a 1/4" square drive socket on the square post (5mm ID, 1mm diameter, not included).

This model is designed to be printed in Stainless Steel or one of it's variants.
The tool can easily be secured to a keychain or lanyard with a 10mm split ring or a No.2 McGizmo clip or similar 25mm gate clip using the hole in the flat driver.

There are some more photos of this object and other examples of my work, both 3D printed and otherwise, on my 'Tofty' facebook page.