The Adjustable Chain Blog · Grace Blooms Adjustable Chains
How Magnetic Clasps Work, and Who Should Not Wear Them
Somewhere in your jewelry box is a necklace you love and never wear. The chain is fine. The pendant is fine. The problem is a ring the size of a grain of rice that you are supposed to pinch open behind your neck, by feel, without a mirror.
Magnetic clasps exist because of that ring. This guide covers everything I get asked about them: how a converter works, how strong the magnets actually are, how they compare to a lobster clasp, the safety question you must read if anyone in your home has a pacemaker, and the honest cases where a magnetic clasp is not the right fix at all.
What a magnetic clasp converter actually is
The Magnetic Clasp Converter in gold: two halves that clip onto the clasp you already have.
A converter is a small two-piece attachment that clips onto the clasp your necklace already has. One half clips to the clasp side, one half clips to the ring side. From then on, you never open that tiny clasp again: bring the two halves near each other and they snap together on their own. Pulling them apart takes a firm tug; fumbling does not.
Ours takes about ten seconds to put on. No jeweler, no tools, nothing permanent, and it works on any necklace, bracelet, or anklet that closes with a lobster claw or spring ring, which is nearly every one made. It measures 1.4" long by 0.4" wide and adds about an inch to your chain, which most women find they barely notice and some actively like.
Bring the two halves close and they connect on their own. No pinching, no aiming, no mirror.
Magnetic clasp vs. lobster clasp
| Lobster clasp | Magnetic clasp converter | |
|---|---|---|
| To fasten | Pinch a spring lever open with a fingernail, hook a small ring, release, all behind your neck | Bring the halves close; they connect themselves |
| Hands needed | Two, with steady fine grip | One is usually enough |
| Security | Very secure once fastened | Secure for chains and pendants of normal weight; a deliberate pull opens it |
| Best for | Heavy statement pieces, high-activity days | Everyday chains and pendants, anyone tired of fighting the little ring |
| Watch out for | The clasp itself, every single time | Implanted medical devices (see safety section), very heavy pieces, cheap versions with weak magnets |
Installed and worn: the converter sits at the back of the neck where the old clasp was.
How strong should the magnet be?
Strong enough that your necklace stays on through a normal day, weak enough that you can open it on purpose. That balance is the whole product. If you have seen complaints that a magnetic clasp "keeps coming undone," that is almost always a weak magnet in a cheap converter, or a piece heavier than the magnet was rated for.
A good converter holds a chain and pendant through daily wear without drama. In practice that means any standard locket or pendant. It is not the right closure for your heaviest statement necklace; keep the lobster clasp on that one and save the converter for the pieces you reach for every day. And if one of ours fails in normal wear within 1 year of delivery, we replace it free under our manufacturer warranty; every order also carries a 30-day return window. That is the strength guarantee in plain words, and it is written down here.
The safety section: read this before you buy any magnetic jewelry
Magnetic Clasp Converters contain strong magnets. They are not suitable for anyone with a pacemaker, implanted defibrillator (ICD), or other implanted medical device. If you or someone in your household has an implanted device, consult your doctor before wearing or handling magnetic jewelry, and keep magnets at a safe distance from the device. The FDA advises keeping strong magnets, this converter included, at least six inches from implanted heart devices; your cardiologist's guidance beats anything you read online, including this page.
Two more honest notes. First, these are ordinary strong magnets, not "therapeutic" ones. We make no health claims of any kind for them; they hold your necklace closed and that is all. Second, keep them away from small children, credit cards, and hearing aids, the same as any strong magnet in your home.
When a magnetic clasp is not the answer
Here is the part most clasp guides skip, because most clasp guides are written by people selling clasps. Sometimes the better fix is a necklace you never have to work the clasp on to get dressed.
An adjustable chain slips on over your head, then slides to the exact length you want and holds there. No ring to find, no halves to line up, nothing behind your neck. It is also the answer for households where magnets are off the table because of a pacemaker or ICD: all of the ease, none of the magnets.
The honest split, in one line each:
- Get the converter to keep wearing the necklaces you already own, exactly as they are, for $14.99 apiece.
- Get an adjustable chain when you want the daily-wear chain itself to be effortless, or when magnets are ruled out in your home.
- Many women do both: converters on the jewelry box, an adjustable chain for every day.
Get it in gold · $14.99 · Get it in silver · $14.99 · See the adjustable chains
In their own words
These are verified reviews from Grace Blooms customers, quoted exactly as written:
Linda S., verified buyer
Lori P., verified buyer
Sandy D., verified buyer
Quick answers
Will it fit my necklace?
If it closes with a lobster claw or spring ring, yes. That covers nearly every necklace, bracelet, and anklet made.
Does it change the length?
It adds about an inch.
Can I put it on myself?
Yes. It clips on in about ten seconds, no jeweler and no tools, and it is not permanent.
Is it safe with a pacemaker or ICD?
No. See the safety section above; choose an adjustable chain that slips on over your head instead.
What if the magnet fails?
Replaced free under the 1-year manufacturer warranty.
Will it tarnish?
It is hand-finished and tarnish-resistant, in gold and silver to match your chain.
Both finishes: gold and silver, to match the chains you already own.
Turn every necklace you own into one you can put on by yourself.
The Magnetic Clasp Converter clips onto the jewelry you already love in about ten seconds. Gold or silver, $14.99, replaced free within the 1-year manufacturer warranty.
Shop the Magnetic Clasp ConverterPrefer never having to work a clasp to get dressed? See the adjustable chains that slip on over your head.
Free shipping on orders over $50 · 30-day returns & 1-year warranty