Specification: Model:5/8"-24 UNEF. Material: HSS . Application range:Generally used in carbon steel, alloy steel and cast iron, such as through hole processing. How to use ： When tapping, insert the head to tap the center line and the center line of drilling. Both uniform rotation and slightly pressure to tap, after don't add pressure. Each turn tap a reversal of about 45 to cut chip, so as to avoid blocking. If the increase in rotational force can not rotate or tap when tapping difficulty, or it will break. Package includes: 1 x Hand Tap 1 x Round Die