The PACKER™ Fixture Collets are machinable collet blanks to accommodate an unlimited variety of work holding applications. The 5C shank can be mounted in any 5C collet spindle for turning odd shaped parts or for milling in multi-axis machining centers. With a little "Toolmaker Ingenuity", multiple cavities can be created to hold and machine multiple parts in a single setup. Mounting in a one or two axis index fixture, the enhanced accessibility of a part can potentially reduce multiple fixturing and cut cycle and setup times. The threaded 5C back screw is removable and replaceable to extend the life-cycle of the collet. When the threads are worn or damaged, the back screw is easily replaced. The fixture collet itself no longer needs to be discarded and remade.