The Convex Guide Rod is a tool for sharpening knives with the convex edge using Hapstone knife sharpener (R1

They are both in look and feel related to La Grise

Dan's Whetstone Translucent Arkansas sharpening stones are used for finish sharpening knives on KME or Hapstone knife sharpeners

dark gray color with lighter dots

Regular - vintage soft stone for coarse sharpening

le series 6 stone holder for kme back-in-stock The Convex Guide Rod is6" Stone Holder for KME allows using Edge Pro form factor stones and other 6" sharpening stones such as Centaur and Ursa series from Venev. Important! Before you make a purchase, please keep in mind this stone holder cannot eliminate fundamental constraints of the knife sharpener, and the stroke will be limited by the knife sharpener design. For instance, the maximum stroke length for KME is approximately 4" even if 6" stone is attached.