Precision meets performance with the Hertel HBBG-C312L3-6.0-.347 Indexable Boring Bar. This left-hand boring tool features a minimum bore diameter of 0.347" and can reach depths up to 3-1/8", making it ideal for demanding machining applications. Constructed with solid carbide for exceptional durability and rigidity, this boring bar maintains accuracy even in challenging materials. The 6" overall length and 5/16" shank diameter provide excellent stability during operation. Designed with through coolant capability to efficiently manage heat and extend tool life, this boring bar accommodates WPGT inserts for versatile cutting options. The screw-type insert mounting system ensures secure positioning during operation. Perfect for professional machinists who demand reliable performance and precise boring results in their manufacturing processes.