Steps to follow:

The Toggle Clasp (OT) is generally used as a pendant clasp due to its design, it is simple to use, just pass the bar through the associated ring to attach it
OT Clasp - Two-part system - Can be used as both a pendant and a clasp, the clasp is attached with the T-bar which locks into the O.

1. Connect the chain and the O clasp with an open ring, Connect the chain and the T clasp with an open ring

2. Pass the open ring through the ring of the charm of your choice (you can have several charms on your chain)

3. Pass the open ring through the chain, Finally close the ring
This is a bracelet with an OT clasp