Feature:Application:The cutting tool for machining the external thread iscomposed of a cutting part, a positioning part and a discharging hole.Specification:Material:HSSColor:silverModel:1/2-28 UNEF1/2-28 UNEFHand Tap size(approx.):80x8mmDie size(approx.):37mmHand Tap size(approx.):94x11mmDie size(approx.):38mmUsage Method:Step 1.When tapping, insert the head to tap the center line and the center line of drilling.Step 2.Both uniform rotation and slightly pressure to tap, after don't add pressure.Step 3.Each turn tap a reversal of about 45 to cut chip, so as to avoid blocking.Step 4.If the increase in rotational force can not rotate or tap when tapping difficulty, or it will break.Package Included:1 x Hand Tap1 x Round DieNote:Please allow minor error due to manual measurement.Due to the difference between different monitors, the picture may not reflect the actual color of the item.