RedLine premium tungsten carbide bars are proudly made in the USA, and provide you with outstanding results due to the stiffness and durability. These bars are extremely effective in a variety of applications including boring, grooving, threading, profiling and reverse profiling a wide range of materials. Our solid carbide boring bars, threading bars, profiling and grooving bars are also available in a quick-change version with great repeatability, which will save you time and money by increasing your overall efficiency. In addition to carbide bars, we also carry standard and quick change boring bar holders to reduce vibration and keep your cuts as accurate as possible. Browse our selection below by size, depth, brand, coating, and more to find the exact tool you need.