The Sumi-Turn X Bar eliminates vibration in ID boring operations even if tool overhang is 6 x D. The new double pocket style head increases rigidity and effective chip control significantly reducing the cost of rough boring large diameters and deep holes. Benefit from increased productivity using wiper inserts because, unlike steel bars, the Sumi-Turn X Bar does not chatter. Its just like using a solid carbide bar - reliable machining and round, straight, parallel bores.