1.Type:Cobalt spiral tap. 2.Material:HSS,HSSE 3.Coated:Tin,Ticn, ... 4.Thread type:M,UNC,BSW with JIS Cobalt spiral taps Features: 1.Type:cobalt spiral taps .2.Material:HSS,HSSE3.Coating ... .Working material:Different kinds of materials like Aluminum,Casting aluminum,Copper,Brass,Carbon steel,Stainless steel.8.Certificate:ISO 9001:2008 ...