With the geometry of handle 90, plunger 50, crimper head 20, and jaws 70, FIG. 22 shows that handles 90/110 are at their furtherest spacing and, as permitted by engagement point 80 of jaws 70 and by jaw opening portion 56 of plunger 50, jaws 70 are open to permit the tool to be inserted onto a cap 2 for crimping onto a lip of a bottle or vial