http://www.heavy-tungsten.com/ - A jig is a type of fishing lure that usually consisting of a lead sinker with a hook molded into it and usually covered by a soft body to attract fish.
6. Why Use Tungsten Alloy Radiation Cap?
Compared to traditional radiation shielding materials such as
lead and boron carbide, tungsten alloy radiation cap provide
excellent density with small capacity.
Tungsten alloy radiation
shielding material could be
made with thinner thickness
but high absorption of
radiation in high density.