yeah only if you are there with the dog 100% of the time. Also, my dog spits things out. he doesn't eat anything so if a strand comes loose, he spits it out, you just have to pay close attention that one get ingested and never let is become a chew toy. My boy loves to tug with rope.
my dogs have those but only when we are playing with them they love to tug. If left alone though they will chew it and it can make a huge mess or cause other issues if that string gets would around inside them. Mine love them on there spring pole we have ropes or rubber loops on ours that they tug on.
I have 2 for Jas. She's not a power chewer at all so i leave one with her all day. Along with a frozen kong with peanut butter, a nyla bone, a kong wubble, and a kong wobbler with a bout a 1/4 cup of kibble in it.