10000 &3000 Double Sides Professional Natural Green and Ruby Knife Sharpener Whetstone Sharpening St

Ruby abrasive is made of high temperature sintering, has the very high hardness and strength,The product is fine texture and closely, has almost not easily worn , high hardness, toughness is suitable for machining of hardened steel, alloy steel, high precision measuring tool and instrument parts: WoodworkingType: Abrasive BlockUsing steps:1.Place the stone in the water for 15mins, better in salty water.2.Grind knives on the stone (first on less grit and then the more one).3.The best angle of knife is 10degree-20degree.4.Do not remove the seriflux, which is helpful for knives.colour:Rose Red + GreenMaterial:size:200 x 50 x 25MMPackage Contents:1 x Sharpening StonesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.