1.Type:Black coating spiral flute tap. 2.Material:HSS,HSSE ... type:M,UNC,BSW Black coating spiral flute tap Features: 1.Type:Black coating spiral flute tap.2.Material ... :HSS,HSSE3.Coating:Tin,Ticn,Bright,H,Alsin- ... lathe,machine center.7.Working material:Different kinds of materials like Aluminum,Casting aluminum,Copper,Brass,Carbon steel, ...