This all stainless backband ratchet is the same as what is used for IR backbands on both whitewater and sea kayaks.
If your old broken ratchet is attached with a rivet you will need to drill the old rivet out and attach this with a rivet gun or a bolt. We have had pretty good success using 1/4 20 bolts and nuts from the hardware store.
Sold individually. Putting a quantity of 1 in your cart will get you one Ratchet.