M14x1.25 spark plug repair tooling kit also includes a mini wrench to use in tight areas.
Kit includes 3 inserts p/n 44185 15.7mm and 2 inserts p/n 44183 10mm
Used in Taper seat style spark plugs commonly used Chevy and other Domestic.
15.7mm reach 10mm reach
INSTRUCTIONS
http://www.timesert.com/html/sparkplug.html
The wrench rotates all the tools, has a 1/2 " inch hex
at the top which can allow you to extend the tooling with a socket further if need.
http://www.timesert.com/html/sparkplug.html