Made of Quality Tool Steel - CNC Machine Made Quality Wood working Adaptors Chose from our drop down as per your requirement of your lathe's spindle nose thread (*that will go inside the Female Thread (FT) to create a Male thread (MT) option for you to attached the desired accessories like Chucks, Faceplates & other related tooling, to work on your lathe machine. Flats allow for solid wrench tool grip for tightening and loosening from spindle but wrench is not included in the price deal. Each Adaptor is marked with our Brand name, Assorts and has the information of the thread sizes. In case you need any clarification about the Female Thread (FT- inside the cavity) and Male thread (MT- the protruding spigot thread) , pls double check with us before making a purchase to avoid any hassles later on. Thanks