I bought a couple replacement blades for an Osterizer blender, to find something that's better for smoothies. My wife stuck them in the knife drawer, as I discovered when I went to find a pizza cutter.
Note that the "knife drawer" holds all sorts of cutting and bladed utensils, and I currently have other dedicated places for "good" knives; but when I did have good knives stored there I put then in cardboard sheathes. The pizza cutter and some other tools come with their own sheathes. Other things don't need it.
But these things are wicked, and I don't want to rummage around in the drawer with those ready to catch a finger! And, other tools may ding the sharp edges.
They are not flat, so a scrap of folded cardboard and binder clip won't do. What's a good way to protect these in a drawer?