Contains 3000 grit side for edge restoration. Our most popular whetstone is Tojiro s #1000/#3000 combination stone, but you may wish to start with a coarser grit for dull or damaged knives and fine-tune your edge using a high grit stone. Tojiro recommends sharpening using the 70/30 rule - spend 70% of your time honing the primary cutting side of your knife, and 30% on the reverse side removing burrs. If you re right-handed, the primary cutting side is the right side of the knife when held in a natural cutting position; if you re left-handed, it s the left side of the knife. Professional quality synthetic whetstone. Contains 3000 grit side for edge restoration. Our most popular whetstone is Tojiro s #1000/#3000 combination stone, but you may wish to start with a coarser grit for dull or damaged knives and fine-tune your edge using a high grit stone. Tojiro recommends sharpening using the 70/30 rule - spend 70% of your time honing the primary cutting side of your knife, and 30% on the reverse side removing burrs. If you re right-handed, the primary cutting side is the right side of the knife when held in a natural cutting position; if you re left-handed, it s the left side of the knife.