1.Type:hss co 8% spiral tap. 2.Material:HSS,HSSE 3.Coated:Tin,Ticn,Bright,H,Alsin-A ... ,UNC,BSW with JIS spiral taps for Stainless steel Features: 1.Type:spiral taps for stainless steel .2.Material:HSS,HSSE3.Coating:Tin,Ticn,Bright ... lathe,machine center.7.Working material:Different kinds of materials like Aluminum,Casting aluminum,Copper,Brass,Carbon steel,Stainless steel.8.Certificate:ISO 9001 ...