1149-South Lion Ball End Semicircular Inserts Finishing R4R5R6R8R10R12.5R15R16 20ZPFG/BNMP3202T2139 Semicircular Ball Blades 1Surface nano coating reduces blade wear Tough and wear resistant Stable and durable performance Increased efficiency 2. Sharp cutting blade and smooth chip removal without sticking knife Suitable for high speed cutting under high cutting temperature, smooth chip removal without sticking knife. 3. Accurate R angle of semi finishing and finishing ball head. Suitable for preheated steel, heat treated materials in the