Feature: Product : Portable Folding Double-Sided Diamond Knife Sharpener 400# 600# Product Size: 125*32*16mm /4.92*1.26*0.63inch Weight: 70g  Material: Diamond whetstone(400#&600#)，Stainless Steel, ABS  Application Scope:Outside tools,kitchen knife, machine tools, woodworking tools, garden tools, cutlery knives etc. Product Usage  1. First open sharpener cover, complete one or both of the following steps depending on how blunt the blades is.  400grit for coarse sharpening: suitable for a blunter knife. Start the coarse 400 grit of the stone, move the blade back and forth over the stone at an angle of 10 - 30 ° by using light pressure. Generally sharpen the tools with coarse stage every six months as required.  600grit for fine honing; it is a necessary step for the elimination of burr on the knife, and makes the blade smooth and bright It is recommended to do it approximately once a week.  2. Clean the knife with the water or wiper and dry it after use and clean the knife sharpener with banister brush.  Kindly Reminder  1. Please hold sharpener tightly when sharpening. 2. Please put sharpener well to prevent diamond surface from contaminating after use. 
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