Swage or NicoPress?
Lifelines are no place to get sloppy with your equipment or with your English. Just to be sure we're all talking about the same thing... Swages involve LOTS of pressure, often with a hydraulic press, to crimp an entire end terminal fitting (usually stainless) onto a wire so it WON'T come off. Mechanical (set-screw) fittings are not generally sufficiently secure for Lifelines. What if it slips? Oops, and your son falls in some dark night? "Sorry, Honey, he fell off and I couldn't find him..." No thanks. Norseman fittings (apparently refered to below, but not by name) are a different mechanically fastened end terminal that does seem to offer sufficient security, but which might be pricey to use as part of your lifeline setup since you'd need a bunch of them. They're most often used to cut costs by people using galvanized wire standing rigging. (The galvanized wire needs replacing frequently, but is cheap to replace, and the Norseman fittings can be re-used.) West Marine often has a crimping tool available in their stores for Nicopress sleeves - the little lead collars that you can slip over a wire loop to make an eye. These are not secure enough, IMO, to use for lifelines. The wire CAN slip, and it most likely will, just when you need it most not to. Spectra or other synthetic lines fail the chafe test, let alone their potential for unseen UV degradation. Now that we're all talking about the same thing...We replaced the upper and lower lifelines on our 36' boat with well-swaged end fittings from a reputable rigger in our area for less than eight hundred dollars, including port, starboard and stern gates. It's cheap insurance . This is another opportunity to do the right thing.