The 2-Loop bezel settings have one open loop on each; no jump rings are required for creating the crystal portion of the bracelet. For best way to open and close these loops, see Jump Ring Hint in Jewelry Basics 101 (PDF).
Adding chain to the back of the bracelet makes the finished project more comfortable for the wearer, and less expensive than using stones the whole length. This also allows for flexibility in the finished bracelet length.
5 each #44-878-51-12-3 JBB Findings Silver Plated 2-Loop Bezel Setting for 12mm 4470 Cushion Square Stone