The Durrow Eternity knot represents two halves as a whole for eternity; balance and strength.
It is a Celtic loveknot found on many Irish, Pictish and Scandinavian stones and crosses. One of the best examples and oldest is found in the Book of Durrow from 675AD.
Note the mobius design which is a symbol of the infinite.
This pattern, when pierced, looks stunning as well because of the balance of negative and positive space.
R378 – 8mm wide Durrow Loveknot
R176 – 10mm wide Durrow Loveknot