TRYMAG 10 Pack Keychain Magnets for Testing Brass, Neodymium Pocket Keychain with Strong Magnetic Rare Earth , Gold Silver Jewelry Test Magnet Hanging Keys Holder

Strong magnets work great for jewelry analysis. I found several fashion rings stamped 925 to be magnetic, which they shouldn't be if they're really 925 silver, including one manufacturered by a high-end name brand fasion designer. You gotta be careful. Easy check right on your keychain.

Handy. Affordable. Strong.

These TRYMAG keychain magnets may be small, but they’re definitely mighty! Perfect for anyone who works with brass, metals, or just has a habit of dropping tiny screws under the couch, these magnets latch onto metal with the enthusiasm of a dog spotting a squirrel. They’re lightweight and compact enough to clip onto your keys or tool bag, so you always have one on hand. The strong neodymium power means they won’t give up on their metallic mission easily—they’ll cling to anything metal like their life depends on it, making it super satisfying for DIY projects or testing. But beware: their love for metal knows no bounds, so if you accidentally drop one, it might just make a break for the nearest metal surface. Pros: portable, strong grip, and handy for small projects. Cons: very easy to misplace, and they can be a little too clingy with anything metallic nearby.

really great

10 pack of magnets. They work great and they are good and strong. I have no problem with them and I will probably order another set of them. I gave 1 to my brother, he put it on the keychain with his truck keys. Later he went to unlock his truck and dropped his keys, the magnet stuck to the truck just below the key hole Therefore he didn’t have to bend over to get his keys off the ground. I’ve been using them to hold bolts and nuts while putting a couple things together. No problems whatsoever. Great product.