1pair Platinum 4 Prong Basket Stud Settings with .041" threaded post (backs sold separately)
                                                                                                                             Highly recommended to only use new backs.
You try yours & damage threads, they are non-returnable.

These are blanks that need their seats cut to set a stone(by a goldsmith). Not anything like a Snap-Tite type. Any sort of marks on
these will be non-returnable.

These are the Heaviest, Highest Quality, and AMERICAN MADE that you will find.
They are 95% platinum and 5% Cobalt. Cobalt is the most durable alloy. It is however slightly magnetic,
rest assured this doesn't make them fake. These are the best that there are.

3mm round (1/10ct diamond each or 1/5ctw)
It is always better to round up. If your stone is 3.10, go with a 3.50mm setting