So I was wondering, where exactly can you get these needles? Or are you just supposed to buy a cactus and clip off the needles?
Many years ago I bought a needle sharpener (see photo). Are these intended to sharpen thorn needles? When I bought it, it came with one needle inserted in the shaft. Does anyone know what kind of needle this is? It doesn't look like a thorn, but it doesn't look like fibre/bamboo either, because aren't the latter always triangular in shape?

