for protecting and leading cables through sheet metal;
grommet turns rough holes into panels and enclosures into smooth openings;
without post-processing of drill holes in plates, secure cables, tubes, or other lead through passages, and so an excellent protection against cutting;
excellent electrical insulation;
this PVC quality is very soft, but also strong;
the grommet also dampens vibration;
quick and easy to install and available in very large range sizes.