They all look the same

The full set includes all 6 grits from 80 to 4000

Tools From Japan

Venev Diamonds may have the flatness tolerance up to 0

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

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