Additional icon packs can be generate from your svg files by using Icomoon service.
You can select free icons suggested in the app.
Or import your custom icon pack to IcoMoon service. The imported icons must be in SVG format.
Under Preferences enter name of your custom icon pack and class prefix. They must be the same. Under CSS Selector choose 'Use attribute selectors' option.
When you are done, download your icon pack .
IMPORTANT NOTE: Multi-colored icons can't be converted to icon font. Your icons must be one-colored.