I'm not a knife guy (John is and he will post a followup here) but this guy had some interesting stuff in his bag.
The knives were all handmade in-house. They looked good and felt great, and the kydex sheaths were tight fitting and well made. Each knife you purchase comes with a matching sheath.
The other product you see is a $20 mounting kit that allows you to attach your sheath to something like a backpack or other bag that is traditionally difficult to attach a knife to. It is not a quick release as I first assumed; rather the mount attaches the sheath to the bag semi-permanently.