The M10x1.0 spark plug repair kit p/n 6604010 tooling
is more suited for holes that 3 or 4 inches in depth.
The wrench which is the black tool 3-3/4" rotates all
the tools, has a 7/16 " inch hex at the top which can
allow you to extend the tooling with a socket further
Inserts not included order separately.
Tooling length inches