The Convex Guide Rod is a tool for sharpening knives with the convex edge using Hapstone knife sharpener (R1, V7, V6, M2, and K1). The convex angle difference can be set to desired value. The universal stone holder of the Convex Rod is suitable for sharpening stones up to 6" (150 mm) including Edge Pro format.
Note. For modular Hapstone sharpeners (R2, V8, M3), use the Convex Adapter instead.