Packaging: Individual Plastic Tube or Plastic Hang Bag. Description: 1) Made of high carbon steel with threaded tip. 2) Metric Sizes (mm):Diameter: 6, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25mmOverall Length: 200mm, 230mm, 460mmFractional Sizes (Inch):Diameter: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1"Overall Length: 8", 9", 18"