Reddit reviews Leegoal 100-Piece 4mm Silver Plated Open Jump Rings, 21-Gauge

I've done both. Here's what I use for chains:

1. Crimps with loops. These go on either end of the chain.
   
   
   
2. Chain. These come in different patterns and widths, so make sure you get the right ones. The width of the crimps needs to be appropriate for the chain.
   
   
   
3. Clasps. There are tons to choose from. Lobster is the most common for chains, but there's also toggle, barrel, magnetic, etc. Just google around until you find what you want.
   
   
   
4. Jump rings, if needed. These might be needed to attach the clasp to the crimps and also to attach your pendants/charms to the chain. Things to note are diameter, thickness, and open vs. closed. Closed is best for hanging onto the chain since there's no gap for the chain to slip through, but closed won't allow you to attach to the pendant unless you're using an open one to go from the pendant to the closed one.
   
   
   
5. Crimper. This is the one I have, but you'll need to make sure whatever you get is the right size for the crimps you're using.
   
   
   
6. Any sort of wire cutter to cut the chain. Scissors don't cut metal. And needle nose pliers to bend the jump rings into place.
   
   
   You're better off getting all these things online. Cheaper and more variety. The links are only examples. Make sure you get what you want!
   
   
   I learned how to do this via how-to videos on YouTube so have a look there. Good luck!
   
   Edit: Saturday morning grammar

Jump ring - your basic ring.

Split ring - basically a mini key ring, and will provide a more secure hold for your key. Both can be found in any craft store, in the jewelry/beading section.

Honestly, it depends on how many repeats you have per row. I use small markers like this when I'm knitting lace and they don't get in my way at all. Jump rings also work well, as long as you make sure to get a size big enough to fit your needles.

Once you get used to marking your work, you won't even notice them (except for when you need to), and it will be immediately obvious when one of your repeats is off.

Silver Jump Rings!

destruction is a form of creation

Thanks for the contest!