A crimping tool is used to attach a metal hub plate to a plastic hub for a data storage disk. by a PCT method, the compound being of the form ABxMy where A is constituted by at least one element from columns IIa, IIIb, or IVb of the periodic classification of the elements, B is constituted by at least one element from columns Vb, VIII, or IIIa of said classification, and M contains at least one element from columns VIb, VIIb, Ib, or IIb of said classification, where:. The upper and lower probes are preferably oriented at substantially 90\xb0 relative to each other. This allows software vendors to write a single application stack and target it to all the different platforms. The electrode material contains platinum as a major component, for example.