Warning: These are open at both ends.
"I've been trying to find some way to keep my earrings in overnight, since even after a year the holes start to close up if I even take them out to sleep. Prong backs are no good because the sharp ends jab right into me when sleeping on my side, so these looked like an ideal solution, with a rounded back instead of a spiked one. I just got them and it turns out they're open at both ends, allowing the spike to pass right through, which is no different from a prong back. Useless."
— Rachel (1/5)