I use a point protector on the end of my dpn to indicate the beginning of a round. These are small and ro not get in the way or weigh down my needle. I really get a lot of use out of them.
They slide off and if you don't JAM them on, you might lose some stitches. I think I prefer the singular point protectors. But since I have these, I'll keep using them, with caution.
These little point protectors are super! They go really small and up to 10.5. They stay put and are easy to take off. Best of all they are just plain cute!