Made with stainless marine grade steel, these swivels are some of the best about.  The strength and corrosion resistance of these, makes them the ideal swivel for making your rig of choice.  Best suited for pully rigs when searching for those specimen fish. 
 
Size guide -
size #3 ideal for clipped rigs
size #2 / #1 ideal for pully and loop rigs
size 1/0 for the big fish rigs