Normal hex keys have an angle of 90 degrees. At PB Swiss Tools (new name for PB Baumann) they thought it might work also if this angle is 100 degrees. The advantage is that the shorter end can even become shorter. Having the same effectivity and even better in certain tight situations. Also available as a Torx key.
More on 100 degrees hex key by PB Swiss Tools: 100 Hex keys ..
For 100 degrees Torx see: 100 Torx keys .