Our custom made Ringinator® brand saw blades. 

1.75" OD x 0.5" ID x 0.010" thick, 140 teeth 

Made in the USA, High Speed Steel Saw blades. Can be used to cut any metal.

These are a larger diameter than our standard 1.5" blades. They can be used for cutting very large jump rings made from thick wire (12g+, 2mm+, 0.093"+). 

For details and speeds, please see the "Info" page.
You need to go slower than when using the 1.5" blades.