Thimble finger spanner / Nut holder

Have you ever been in a situation where you had to tighten a bolt but could barely touch the other end of the bolt? You tried to hook the nut, it fell off many times, you started to get nervous. Well, then this spanner kicks in. Covers nuts:
M3 (5.5 mm and 6 mm spanner),
M4 (7 mm spanner),
M5 (8 mm spanner),
M6 (10 mm spanner),
M8 (13 mm spanner)

If you have a better name for this type of tool please let me know.

EDIT:
Newer version available https://www.thingiverse.com/thing:5128862

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