Technical Jasper is mined in the Ural mountains in Russia

abrasion resistance

Different colors of blanks will help to avoid mistakes of using the wrong grit

North Wales

Charnley Forest stones may have slight natural imperfections

convex rod for hapstone back-in-stock Technical Jasper is mined inThe 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.