TRYMAG Keychain Magnets for Testing Brass, 4 Pack Neodymium Pocket Keychain for Purse with Strong Magnetic Rare Earth, Gold Silver Jewelry Ferrous Metals Test Magnet Hanging Keys Holder

Great little magnet for caregivers for resetting life alert pendants. Fits perfect on the keychain and small but effective . Will be purchasing more soon.

These are pretty sweet.A nice strong magnet.

Hooked on my work key ring so I can activate the E-Band monitors used for Transport. It’s works great. Plus it makes it easy to check different metals when not working on the clock. It is also a very strong little magnet, can use it to hang my keys eye level in the shop.

Anodized color won't last, but look good, and great magnets!

Prompt shipping.

I purchased these to test doors in house to see if they were metal or wood and use them to test jewelry for precious metals. They worked very well for what I needed them for. I felt they were strong for their size. Like any magnets, be careful where you place them because they can damage or erase information from items/electronics.

I have bought these in past and the magnets seem to be weaker now. I suppose if just have a few keys it will be just fine but if you put any significant amount it is knocked off the metal very easily. However for the money still okay purchase. Only the silver ones though the black ones are for sure weaker.

Great magnet for everyday use. I work at a scrap yard and this magnet is strong enough to detect iron in even some non-ferrous metals. Magnet is small and compact and fits perfectly on my zip holder.