37mm to 42mm Ø (SOMT 13 Insert)

Top-Drill has a 4 cornered economical insert design,the same insert is applicable for both internal and external pockets, improved machinability due to ideally configured cutting edge, applicable to most materials including low carbonand mild steel, helix flute geometry by twisted coolant channels enabling excellent chip evacuation and high precision hole operation & enhanced insert's durability with TT9080