Great to have in your field repair kit or to replace an already broken buckle. Even if you just need one for replacement it's a good idea to have a backup when you're out on a ride. The Quick Attach models can be installed without any sewing, using a clever 'split bar' or snap configuration.
In many cases, it's also possible to update your older-style Ghost Eye buckles to SJ, with a combination of the options available on this page.
Buckle size corresponds to webbing width. This style of buckle is used on all of our current bags. Make sure you get the size right, and the adjustability where you need it. If you're not sure what you need, please give us a shout!