Hapstone Planeshift Clamp Upgrade for KME and WorkSharpHighlights Enhance your sharpening system with the Hapstone PlaneShift Series, featuring components adopted from the Hapstone RS system for superior versatility and performance. Introduces a dual clamp solution compatible with both Work Sharp Precision Adjust and KME knife sharpeners, expanding the range of blades that can be sharpened, including fillet knives. Made from high quality aluminum, ensuring durability and reliability for long term use.