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Mqr Solid Carbide Small Internal Turning Tool, 47° Single Point Copy Turning Micro Boring Tool. Designed for micro small diameter internal hole machining. Solid carbide substrate, high rigidity and bending resistance. Excellent performance for stainless steel internal turning. Stable cutting, effectively reduce vibration and chatter marks. Precise dimensional tolerance to guarantee machining accuracy. Optimized chip pocket for smooth chip removal in small holes. Wear-resistant substrate to extend tool service life. Suitable for CNC lathe micro internal boring operation. Multiple models MUR / MPR / MQR to meet different machining needs. Good finish of inner hole surface after processing.