TRIXIE Pet Products Magnetic Collar Key, Black

These are bigger than the normal tear-dropped shaped ones. Maybe to big for my cats, but I will keep them for backups, cause you lose these occasionally. And, at under $1 you can't go wrong.

huge, this magnet is huge and weak. Its even larger than it states and is super weak. Wouldnt even trigger my door.

Large and clunky and not for my pets.

Doesn't work for my cats either!

this magnet is far better than the ones that come with magnetic cat flaps, its bigger so therefore does not tend to ride up the cats collor and makes it so much better for your cat to get in.

Great design. Neatly fits on collar, doesn't dangle, less chance of snagging

have used before with a larger cat therefore was concerned with the smaller size of cat. No worries ideal for allowing own cats into the house without the worry of other cats. Occasionally if the magnet is pushed up against the cat flap i.e. too close the catch will not work however this is not a problem

Fits much better onto the collar than the ones supplied with my cat flap although the magnet is pretty big! Overall a great buy!

This is a collar magnet, but more suited to a small dog than a cat; the one our cat lost was half the size so we have been struggling to get her to wear it!