1.Roll form taps 2.Material:HSSE,CPM,CPS 3.Coating:Tin,Ticn,Alsin-A, ... .Long or short chamfer Roll form taps for tapping machineFeatures: 1.Type:Forming taps .2.Material:HSSE,CPM,CPS3.Coating:Tin,Ticn,Alsin ... -A,Bright etc4.Thread type:Long Chamfer Type or Short Chamfer ...