... :roll form tap. 2.Material:HSSE,CPM,CPS 3.Coating:Tin,Ticn,Alsin-A,Bright etc 4.Thread type:Long or short ... Chamfer Roll form tapsFeatures: 1.Type:roll form taps2.Material:HSSE,CPM,CPS3.Coating:Tin ... ,Ticn,Alsin-A,Bright etc4.Thread type:Long Chamfer Type or Short Chamfer ...