A chuck like device designed to hold, by means of a collet, various kinds of round work while performing machine or drill operations. It consists of a tapered receiving sleeve (sometimes integral with the machine spindle), the collet proper which is inserted into the receiving sleeve and a cap that screws over the collet, clamping it via another taper.
Collets are used to hold a tool in place. It forms a collar around the object to be held and exerts a strong clamping force on the object when it is tightened, usually by means of a tapered outer collar.
Milling holders & adapters are the physical interface between tooling and the machine tool. Designed for stability and strength, milling holders are productive during many applications.