Caution: At the time of pulling out the coil of blind hole thread, cut it up to blind hole thread size and use Please grind it little by little at the time using the grinder.the front tip is heat treated There is risk of cutting the material with electronic, Size: M3-0.5, M4-0.7, M5-0.8, M6-1.0
(untill unified size No4-40 to No10-24 applicable), Usage: 1. With handle or tap handle, make edge of coil insert out a bit. 2. Setting the electromotive driver to opposite revolution, turning slowly at low speed, and pull out.