The Sunnen ANR Portable Hone is the go-to solution for heavy-duty, in-place cylinder honing. Engineered for rugged environments, it combines high-torque performance with fast, accurate metal removal—perfect for large engines, compressors, and hydraulic cylinders. With a range of 2.5" to 21" (63.5 mm to 533 mm), the ANR delivers exceptional surface finishes and roundness without disassembly.