SRAM Powerlink Gold 9 Speed - Pack Of 4 2013
The convenient PowerLink makes it easy to join links together. No tools needed. Insert, press, lock - it's just that easy!
What is there to say? They work, they're huge time savers, and they're inexpensive.
If you ride with a compatible chain, be sure to buy a 5 pack, and keep them in your pack while you ride, they are the fastest way to deal with a broken chain on the trail!