Each bone depicts the multiples of the one-digit number at the top of the bone. See the 7 bone above.
Multiples are used here to complete multiplication, division, or taking a root.
With understanding of multiples and how Napier's Bones make listing of multiples of a number easy, multiplication, division, and the taking of a square root become tasks which may be completed by one who is not great at multiplication.
With attention and repeated multiplication, division, and root taking, one may become more profficient at multiplication.
The following pages and materials are now appropriate.
Many other manipulatives on many different topics are found at: MathTokens.Com.