6604412 NOTES:

M14x1.25 spark plug repair short tooling:
Normally used on vehicles that the spark plug is
near the surface.

Examples would be small engine repair as in
mopeds, lawn mowers, out board motors and some
motorcycles.  These applications would not require
long reach tools.

6604412 kit is used for washer seat as well
as tapered seat applications.  The installation is
exactly the same for taper seat or washer seat
you only need the appropriate length/style of insert.