Dental Ceramic stone (whetstone) and test stick Dental hygienist DH scaler Traces of use are visible on the whetstone surface. Since it has not been used for a long period of time, I don't think the whetstone has worn down much. I think it can still be used, but please check the current condition in the photos. Please purchase if you understand. Both have been used twice in practice. I have never sharpened with a scaler that has been put in the oral cavity. Thank you for viewing. No price reduction, instant purchase available Other dental hygienist teaching materials are on sale. #SunDental #T&S Black Ceramic Stone #Whetstone #Sharpening #Dental #DentalHygienist #DH #Scaler #CeramicStone #DentalHygienistTeachingMaterials #PlasticTestStick #TestStick #SharpTester #Psychology #Textbook #DentalHygienistTextbook #IshiyakushuppanCo.,Ltd. #DentalHygienist #DentalHygienistTeachingMaterials #TeachingMaterials #DH #Dental #DentalTechnician #Dentist #Dentist #NationalExaminationPreparation #NationalExaminationStudy #NationalExamination #3rdEditionAnyoneCanAchieveSureResultsWithSmallEfforts #Fluoride #CariesPreventionAndApplicationOfFluorides #Sunabousha #StudentEdition #DentalHygienistTeachingMaterials #Dental #Model #AlveolarBone #NISSINDENTALMODEL #JawModel