Set of large collets in fitted wooden box. 1/4 to 1 1/4 inch range by 1/16ths. Parallel portion of body 1.500 inch diameter. There is a headstock adapter included, external taper is 2.000 major diameter, 1.875 minor by 2.312 long. An adapter could easily be made to fit these collets to any large lathe with around 1.75 inch+ clearance through the headstock. The complete set is in excellent condition.