I'm not sure how yours are made. Mine have a stainless spring that the line runs through. The spring loop is very smooth. We don't seem to have line fray other than from twist. The extra swivel helps. Ours are fairly cheep, around $25 per 12. I have had better luck with them than jugs. I think it is because the brush tops hold bait fish and serve as a lair for the flatheads.