The online photo and the Judith Jack designer name might lead one to expect more than received.  The photo is an extreme closeup and gives the appearance of a large substantial piece.  That is not the case. I have learned that you always have to read the description closely.  With the price of silver now I knew it would be small.  Note in the description that it is .5 grams in weight.  The extender is well-made and has smooth edges and the designer tag and 925 stamp.  But it is very small.  I wanted it to go on a Honora 18" pearl necklace.  The "o" ring is so small it barely slipped on the lobster claw clasp of the pearl necklace.  The spring ring is adequate size.  I do believe I got what I paid for but would like to share further opinion of this item.  I have short hair and on my pearl necklace this looked hideous from the back.  This is so thin and you can easily see where it was attached and where the pearls began.  I wore it only because my sweater covered up the extender.  I would never wear this where it can be seen.  Also, I would never put anything heavier than an 18" strand of pearls on this as I don't believe it is substantial enough to hold anything heavier without coming apart and losing the necklace.  I will keep this items as it serves its intended purpose for this one necklace.