Set of 7 Fahnenstock Mixing Dental Lab Knives Modeling Alginate Mixing Fahen Knife Set Manufactured from AISI 420 German stainless steel. Product Conforms to ISO 9001, CE-Quality Mark, ISO 13485, FDA and other Quality Standards High Degree of Precision and Flexibility while conducting the Clinical Procedure. Set of 7 Fahnenstock Mixing Dental Lab Knives Modeling Alginate Mixing Fahen Knife Set