I would like something secure (preferably locking) and not made using cheap labor but I can be flexible. Obviously the keybar magnut isn't locking so I'm here exploring other options. I didn't go with the nite ize nite binder because I hear those aren't durable. I've looked at carabiners but either they're not locking or too big.

So far the best contenders I've seen is the keybar medium Magnut which has about 18lbs of pull forcem