THREAD CHASER SET. IMPERIAL 9 TO 28 TPI

HAND OPERATED THREAD CHASER.  TYPICALLY USED ON EXTERNAL THREADS BUT CAN BE USED INTERNALLY WHERE THE DIAMETER IS LARGE ENOUGH SUCH AS EXHAUST PORTS, WHEEL LOCK RINGS ETC..  KIT CONTAINS A UNIVERSAL HOLDER AND ONE OF EACH OF THE FOLLOWING SCRAPERS:

9, 10, 11, 12, 14, 16, 18, 19, 20, 22, 24, 26 AND 28 TPI. 

THIS COVERS JUST ABOUT EVERY THREAD ON A NORTON ALTHOUGH THE SMALLER THREADS WOULD OF COURSE REQUIRE TAPS TO CLEAN THEM UP.