Inspired by the NASA Ratchet, and a large, double conic shaped ratchet,
http://www.thingiverse.com/thing:1038181,
I Wanted to make a faster, single print, no support, 6 internal springs, for hex bits. Includes storage. Hope you like it!
Also check out my 3D Printer I designed at...
www.Reach3dPrinters.com

No

No

.2mm

50% or more

Print without supports. If the bottom of the knobs print clean, so will the inside. If the bottom of the knobs wont, the inside might not, as there is a hovering ring above the internal gear, with a slope, slightly steeper than the knob edges.
I printed at .2mm layers, at 30-40mm/s, took about 2 hours, 20 minutes.
After Print, from the top, push the inner hex drive shaft, into the body, it should pop loose! It should then be free to ratchet. Flip upside down to reverse ratcheting. The Arrows show the Driving Direction, Forward and Reverse.