4.Use after a period of time. Please use cooking oil. Apply a knife. Allow the cutter to be fully lubricated. This keeps the cutter sharp
5.If there is Fine burrs. You can touch the edge by hand. It will disappear. Please do not ask for 100% .Thank you again for coming. Our goods are all hand-made tools. If there are any problems in the shopping. Please communicate with us. Thank you. I wish you a happy shopping in the Amazon. Thanks