The Multi Tap has an End Mill on the tip and a Side End Mill in the complete thread portion right after the chamfered thread cutting teeth. With these end mills and tapping threads, deformed molded holes can be accurately milled and tapped in one cycle of tool feeding. ・ Internal threads are precisely trimmed by the Side End Mill at the sametime with the tapping process. With no burrs and uniform minor diameter, the concentricity of the minor diameter is improved to produce highly accurate internal threads. ・ Internal coolant supply enables tapping to the full depth of a blind hole with minimum margin at the bottom. The casted remainder in the bottom of the hole is rejected at the time of tapping.