In April of 2012, Spiderchain took over production of Scott Plumlee’s kits. (He’s currently traveling the world – lucky fellow!) These mandrel-tip pliers were developed by Scott and Swanstrom for projects in his second and third books. You can find kits, books, and other information on Scott’s page.
The tips of small version measure 3.1mm and 3.9mm. These are the sizes that Scott recommends for wrapping 19ga wire.
The tips of large version measure 3.5mm and 4.5mm. These are the sizes that Scott recommends for wrapping 18ga wire.