Features: Provides a drill chuck adapter to connect the drill chuck and impact wrench tightly. Precision threads ensure a tight and stable connection. Fine and strict workmanship ensures its long life. Mainly used for conversion impact wrench.100% brand new and high quality. Specification:Thread mounting: 1/2"-20UNF Chuck adapter thread: 1/2"Mounting range: 2-13mmSize: as the picture shownPackage Contents:1*drill chuck1*drill chuck adapterNotes:1, The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2, please allow slight manual measurement deviation for the data.