Idahone Ceramic Stones are used for sharpening knives using Hapstone or Edge Pro knife sharpener

and clamping jaws

How about other arkansas types - 'true hard' and 'black translucent'

Gritomatic makes additional lapping for Idahone Ultra-Fine and Medium Ceramic stones

glass blank for edge pro lapping films Idahone Ceramic Stones are usedGlass blanks are used with lapping films for the ultra fine sharpening knives using Hapstone or Edge Pro knife sharpeners. The glass bar is attached to an empty aluminum blank. Glass blanks are available in standard and narrow sizes. Narrow size (12 mm wide) is suitable for recurved blades. Standard Glass on aluminum blank Working area 152 x 25 x 6 mm (6" x 1" x ") Suitable for regular blades Narrow Narrow glass on aluminum blank Working area 152 x 12