From the manufacturer:
Knitting Needle Point Protectors Knitting Needle Stoppers Notions Gifts for Knitters.
These soft, slightly squishy knitting needle point protectors are so fun to use! Made of BPA-free, food-grade silicone, they keep your stitches secure and defended against the chaos of the universe. If only they worked for more than just knitting...
Simply stick your knitting needle points into the hole in the point protector and your stitches will stay secure! Works best with needles size US 3 - US 11.
Disclaimer: I am not responsible for any damage or drama that arises from the use or misuse of these items. Please securely store out of reach of pets, babies, kids, and maybe some adults (you know the type). By purchasing these items, you agree to take full responsibility for whatever happens to them.