Abstract: A collet includes an annular collar and four arms extending from the collar. Each arm has a reduced outer diameter arcuate section, an enlarged outer diameter arcuate section and a tapered arcuate section with a fan-shaped cross section at a distal end. Further, each arm has a first mold witness line presented on a boundary between the enlarged outer diameter arcuate section and the tapered arcuate section. Besides, each of two opposing ones of the four arms has its opposite side surfaces parallel to each other along its reduced outer diameter arcuate section and its enlarged outer diameter arcuate section. Each of the other two opposing ones of the four arms has a second mold witness line presented along its reduced outer diameter arcuate section and its enlarged outer diameter arcuate section and terminating at the intersection with the first mold witness line.