These are some of the nicer clasps I've seen of this type. I recommend them very highly.
7mm Silver-Plated Brass Kumihimo Ribbed Cord End & Toggle Kit
The Kit is fine but the description/name is deceiving. Most other ribbed cord ends are described by their width, not their length. I ordered two, expecting a small 7mm cord end but received much longer 16mm ones. Read the descriptions very closely, not just the items' names.
There was a bad rating on this item and I would like to suggest that you put a few chain links or a few more rings on the toggle so that the bar can go all the way thru the circle and then it will work-it will not work if you are trying to put one side in only or have it attached right up to the attachment end. This makes a nice secure toggle kit when the bar is long. Hope you get what I am saying here. :)
I was not able to get the bar through the round toggle finding, the bar is way to long. I ended up using a lobster claw instead. I bought four of these waiting for them to come back it. I will be sending three back.