6" Diamond Whetstone: Mainly used for sharpening metal & woodworking tools, gardening tools and all household implements and tools, such as knives, scissors, slice, etc...They are electroplated with selective synthetic diamonds on steel base. -will not break, chip, crack, hollow or groove. -Very easy to use, no oil required.
Blue - Coarse #180/#240 Quickly restores a dull edge to cutting sharp again. Customers that desire cutting fast action without worry of edge refinement often use our coarse models. Color code: Coarse (180 or 240 mesh) "blue".
Red - Fine #360/#400 Restores to a fine edge any knife or tool that is slightly dull. Many of our customers consider the fine grit to be a medium/all purpose sharpener. It's the edge refinement step done before micro beveling and polishing. Color code: Fine (360 or 400 mesh) "red".
Green - Extra Fine #600 Refines and polishes the sharp edge to razor sharp perfection. Your tool is now ready for stropping! Color code: Extra fine (600 mesh) models "green".