Genuine Seco square turning insert, Grade TP25. Key Specifications Grade TP25 Insert Shape square (ISO shape code S) Insert Details S shape code. T Insert Type. 7° insert side clearance angles. About Grade TP25 The universal grade for highly versatile performance over a wide range of applications in steels, stainless steels, and cast irons. Trustworthy alternative at limited cutting speeds or high surface finishes requirements. Ti(C,N) + Al2O3 + Used Edge Detection (Chrome). About Seco Turning Inserts Anything is possible when it comes to our broad selection of general turning grades and chipbreakers. Supporting inserts of different shapes, sizes, and thicknesses, we developed each of these solutions with the same goal in mind: to boost the productivity and tool life in your turning applications. Covering all material groups, this comprehensive range allows you to achieve your goals in terms of material removal rates, tool life, and surface finish.