You will need a special small and long wrench socket size 14mm to remove the spark plugs of your BMW C600Sport & C650GT engine (article number 682062). In addition to the wrench socket you will need an extension (article number 880039) and the correct 3/8inch ratchet wrench (article number 821557).
This feeler gauge set includes a metal cover, like the...
High-quality Allen keys made of chrome-vanadium-steel are...
1/2" or 3/8"
with a large torque adjustment range...