this is SHARPENING MACHINE+WATER TYPE---MADE IN JAPAN !! YOU CAN DO SHARPENING ACTION AS NEW SCISSORS AND THIS MACHINE IS USING WATER SO,HARDNESS IS NOT CHANGEABLE----COLD SHARPENING,NOT HEAT SHARPENING PLS TRY IT TO YOUR MARKET & CUSTOMERS !! ALL CUSTOMERS WILL SATISFY FOR YOUR REPARING ACTION !! GREAT !!