Enneades Arithmeticae, or The Numbring Nines was a short book published by Joseph Moxon in 1684. It describes a tool for multiplying a large number by a single digit. These rods were directly inspired by Napier's Bones, and were intended as an improvement, though really they're not much better.
Here's a short video I made about the Numbring Nines rods.
This is part of my series of videos about antique computational devices. Here is the full series playlist
A full set has 100 rods. This PDF is 5 pages, with 20 rods per page.