Clover's Point Protectors and Stoppers are helpful when you're using double pointed needles as single pointed needles. I typically do that when I'm knitting up a swatch. So, what's great about these? One, they're going to stop your knitting flying off the ends of your DPNs; and two, they're different colours to help you figure out the side of the fabric you're working on. Genius.
Suitable for double pointed needle sizes 2mm to 6.5mm (US0 to US10.5) and there are six stoppers per pack.