These keychains are very well made. They don't come off too easily, which is very important. However, they gently disengage when the plunger is depressed. I like that the main body is solid brass. Brass is a good heavy alloy that won't rust in your sweaty pockets. The detaching/replacing action is very smooth and the halves snap together with a firm, determined click. This gives you peace of mind that they won't fall apart on their own. No lost keys! These are the ones who buy!
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