Insert one end of horseshoe into ring.
Continue turning horseshoe through ring.
Continue turning horseshoe, pulling chain with it, until horseshoe is completely through the ring.
The horseshoe passes through the ring and the clasp is secure.
For a convertible chain, on the shortest setting, put the horseshoe through the first ring and continue to pull the chain.
Insert one end of the horseshoe through the second ring and repeat steps 1-4.