The Interchangeable Extractor Set is the most popular extractor set on the market. Its compact size allows you to carry a variety of extractors inside the handle. It includes 4 extractor blades stored inside a hollow handle: 1 saw blade; 2 spiral blades (.040″ / 1mm diameter) and 1 spiral blade (.050″ / 1.27mm diameter) This listing is for 1 extractor set which comes with 4 Interchangeable Extractor Blades.