Metric "Fix-A-Thread" Inserts, Taps & Tools Assortment (For Spark Plugs)Hillman Item #59167
An assortment of various steel threaded inserts, plug taps, and insert tools from Hillman. This assortment includes metric threaded inserts, as well as all insert tools and plug taps needed to create thread holes and fix inserts into place. The contents of this assortment use a fine M14-1.25 thread size and are specially engineered for engine/spark plug maintenance. Included inserts, tools, and plug taps are ideal for adding screw thread space for spark plugs. Full assortment contains five (5) refills comprised of Hillman Item #'s 59168-59172.