Solid manufacturing. Clasps shut firmly. A little weight to these, but not too heavy so you know you're wearing them, and they're comfortable to wear all day. I bought these to match an old Turquoise necklace that belonged to my great-grandmother. The style matches it well and also seems to work with older style or more modern pieces I already have. I've had these a little while now and I wear them quite often, I've had no issues with durability or anything breaking or coming off. They seem to be strong and well made.