3pcs matte white blade ceramic knife set: 4 inch cermaic fruit knife 6 inch ceramic chef knife 2Y peeler,white blade,blue handle Composition Wt% ZrO2+Y2O3 % ≥ 99.6% Specific density g/cm3 >6.0 Hardness (HV) HRA >87 Fracture toughness Mpa·m1/2 8 10 Gain size um 0.65 Elastic modulis GP2 200 Thermal conductivity W/m.k 3 Thermal expansion Coefficient 10*10-6/°C(20to400) 9.6 Characteristics of Kingdouble ceramic knife 1. The best tool for guaranteeing the baby’s health 2. The best Sharpness as never need to be sharpened 3. Keep the food fresh 4.Martly well design to use comfortably 5.Keep the nutrition of food 6.Our Ceramic knives never get rusted & leave Metal Ions on the food 7. Rest assure to cut the excitant food 8.Healthy and environmental 9. Global Fane of Ceramic Knives About Kingdouble Company 1.The earliest & the most professional ceramic knives manufacturer in CHINA; 2.The designated ceramic knife gift supplier for EXPO SHANGHAI 2010 "City Star"; 3.Spacialized in making and producing ceramic knives more than ten years. About using 1.Don’t let the children play with the knife,and don’t try the sharpness with you fingers.The blade is so sharp that would hurt you fingers. 2. Suitable for the straight cuts of the fruits ,boneless meat and so on . 3. Please use it on the plastic chopping board or the wood cutting board. 4. Avoid using the ceramic knife to carve,pry,bone or cut frozen food and cheese.Because that requires a more flexible knife,such as steel knife.Use the material which is more softer than ceramic knife would be more suitable. 5. For your safty, the top and the heel of the blade have been shaped into circular shape. Caring 1.Avoid using the dishwasher to wash the knife,please use your hands and liquid dish soap. 2.For the discoloration which is hard to remove by nomal washing,you can put the blade into the bleaching agents (not the handle). Attention Don’t drop the knife on the surface of hard things . Don’t use the tip as a fulcrum (it would damage the knife). Don’t put the blade in an open flame.( physical reaction would happen) Don’t use the blade to hit the food or other hard things. Methods for safekeeping 1.Store the knife in a tool carrier,a sheath or a tray. 2.In order to avoid damaging the tip of the blade,please pay much attention when storing and removing the knife.