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carbide comma grooving insert MB05MB07MB09, tungsten carbide threading turning cutting insert for CBN CNC lathe machining. Max cutting depth 6.5mm, solve deep internal grooving for small bore parts. Solid carbide shank, 150mm long reach, anti-vibration for smooth finish. Precise insert locking slot, quick change & long service life. Built-in coolant channel, smooth chip removal for deep bore machining. Compatible with multiple inserts for steel, stainless steel, aluminum & cast iron. Anti-corrosion nitride coating, extended service life. Strict dimensional tolerance, stable mass production without frequent tool setting.