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I've got these on my car keys and backpack zippers, and the locking mechanism finally stops them from popping open in my pocket. The way it clicks closed feels solid, and swapping keys between my fob and bag takes two seconds now.

The new black locking mechanism is a game changer—my keys stay put on my work bag even when I’m hauling it around all day. Swapping them to my car fob takes two seconds, and the click when it locks feels reassuringly solid.

Swapped this onto my car fob in seconds and it hasn't slipped off once since. The locking mechanism clicks shut with a reassuring sound, and detaching the key when I need to hand it to a valet takes no effort at all.