These components are shown as an exploded view in Figure 8, and a video demonstrating actual installment is available on the Internet.3 This design also easily accommodates stingers of differ- ent lengths if needed, and the arrangement is so simple that it is difficult to imagine having to set up the test without this important feature. Through-hole armature design with a chuck-and-collet stinger attachment makes test setup so much easier that the term modal shaker usually refers specifically to a shaker that comes with a through-hole armature (as opposed to a traditional platform/table shaker style used for general vibration testing).