The fixture to keep the small (25mm) 1/4 bits in the Bosch Custom Case. 

The holes are 7.4 mm, that in my case is acceptable to keep bits in, since the intent was to use the fixture with Medium size Case (the one with transparent cover), so even if the bits will slide in their places - they should not leave it. 

7.45 is the version with holes 7.45mm, that may give you a bit more space for bits if needed.

Please note that the fixture is designed for bit holder with 10 mm external diameter.  There's another version of the file with letter “W” - for bits that are 10.4 mm in diameter, (e.g. Wera).

Version "T" is the special edition of the insert for the Truper PNU-100 set. There is also take 2 of this version with additional holes and some tweaks like the "wall" for tweezers and take 3 with 1 mm floor in the holes, 5 more holes and slightly higher walls.