ISI Beryllium Nickel
T
he compact ISI-N (beryllium nickel) irons are
an industry first. Nickel's reputation as a tough metal with excellent
resistance to corrosion makes its application to golf equipment a natural
choice. By heat treating it to the proper hardness, we are able to take
advantage of these inherent qualities to produce the softest feel in an
iron we've ever offered.
The company:
http://www.pinggolf.com