[steve-45]

Originally Posted by planenut

You can get a special tool for it, which has a handle fitted. Last resort try a similar size torx key. As suggested it is a 7mm which was the only one my set didn't have.

This type,
https://www.amazon.co.uk/Draper-Expe...SIN=B0001KA0EK

I’ve got 2 sets of metric Allen keys and neither set had a 7mm key.

Ended up buying a 7mm key with an extended handle which are advertised as a brake servicing item.