Specifications hand tap in hand tool 1. in all sizes 2. material:HSS,Website:://.delicoil.com, alloy steel, carbon steel 3. package: portable plastic boxhand tap in hand tool1.size range:M2-M56, in all standards2.material:HSS M2,W9341,W4341,alloy steel, carbon steel3.special:with one fixed slot to avoid skidding,especially for Russian market user4.of high quality5.internal thread cutting6.packed in portable plastic boxSpark plug taps. Also known as Piloted Reamer Taps,pilot nose taps, for use in spark plug applications.Spark Plug Taps have a pilot thread at the front, to pull the tap into the hole, followed by the reamer section which removes the damaged threads and then by a larger tap sectionwhich cuts the proper threads for the HeliCoil spark plug insert to be installed.No prior drilling of worn out threads is needed with HeliCoil spark plug taps.Material: carbon steel,alloy steel,high speed steel.HSS Straight Flute Hand Taps /Machine Tap ItemTapsMaterialHSS/CarbideSizeMetric/InchFluteStraight