They all look the same

Bonded diamonds provide better feedback and give the sharpening stone a much longer lifespan

Tsushima Whetstones are used for fine sharpening on Hapstone or Edge Pro sharpeners

Idahone Ceramic stones should be used with one of these lubricants:

with the exception of CS-HD series stones

rotating clamp module for hapstone They all look the sameRotating Clamp Module for Hapstone Modular Platform is a module delivering the ultimate combination of high precision, versatility, and ease of use to knife sharpening enthusiasts. The rotating clamp module has the crossbar for multiple clamps (up to 6). The rotary unit has adjustable flipping strength. Rotating Clamp Module is part of Hapstone R2 knife sharpener. Compatible Clamps Universal Angled Asymmetric Angled Clamps can be turned inward (for