●1.Dimensions -- Type:16ER (external threading insert),Diameter of inscribed circle :9.525m Pitch: 16IR1.0=0.039”, 16IR1.25=0.049”, 16IR1.5=0.059”, 16IR2.0=0.078”, 16IR2.5=0.098”, 16IR3.0=0.118”, Patial profile 55 degree, single sided; ●2.Material:made of solid carbide with mutilayer coated, offer long life and faster cutting speed, low friction coefficient, good wear resistance; ●3.Suitable for finishing and semi-finishing of various steel, stainless iron and cast iron, Wear-resistant and heat-resistant, not easy to stick to the holders or workpieces or break up; ●4.Fit for SER/SNLThreading tool holders ●5.Package includes: 10pcs / 60pcs (As shown)