6 DIFFERENT SHARPENING KNIFE STONE : 6 pieces grinding stones with anti slip base,made of diamond material. They respectively are 240 or 400 or 800 or 1200 or 2000 or 3000 DIAMOND MATERIAL: The diamond sharpening knife stone is made from diamond, which turns out to be tougher, stronger and more than those made out of stone material. EASY TO USE: One of the most outstanding features of this diamond sharpening knife stone is that there is no need to use water when you are sharpening . WIDELY USED: This type of sharpening knife stone can not only be used alone but more importantly, you can use it together with sharpener. In this way, it can make the effect of sharpening a knife more precise and efficient. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:diamond Package Contents: 6 x Diamond Whetstones(240 or 400 or 800 or 1200 or 2000 or 3000) 1 x Leather Strop 1 x knife sharpening Angle Guide Only the above package content, other products are not included. Note: Light reflection 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.