ZAK-15P Carbon Fiber Extension Tool with Key - Durable Multi-Purpose Hand Tool for Mechanics, Electricians & DIY Projects - Perfect for Tight Spaces & Hard-to-Reach Areas

First off, this key holder has very quickly become a part of my EDC, as it’s extremely high quality, and allows me to swap out keys if one breaks. One of the keys that came with it doesn’t fit my handcuffs exactly right (it still will unlock, it’s just extremely tight), while every other key that I’ve ever tried will unlock them just fine. With that being said, both keys function completely fine with my thumbcuffs, so I’m not entirely sure the deal there. Either way, this product feels very secure and I recommend it to anyone looking to easily carry a handcuff key on them at all times!