High-quality Allen keys made of chrome-vanadium-steel are almost indestructible. You can buy them in different sets or as single items. You will need them e.g. when you work on your casing, bag holder, valve cover, fully suspended drive, oil filling screw and so on.
Part no. 137521:
Adapter from 1/2" to 3/8" to use a...
Consisting of one tie-down strap with S-hook and a...
You will need a special small and long wrench socket size...