I'm not writing to complain about this product, as I think it is generally well made and will suit a lot of people's needs, but it doesn't suit mine, and I'm hoping my explanation can save some others some time. Particularly, you can't just weigh an object and expect it to work if it is even half of 8 oz, 225g. (TL;DR: It's not strong enough to hold a 100g/3.5oz object without pulling the chain out on every step, despite the 8 oz rating.) They rate it at 8oz (Ounces? Really?). Anyway, that's about 222 Newtons of force (FYI, the Ounce is not strictly a measurement of mass, but force). So this is the Force that a roughly 225g object applies to a table top when just sitting still, as such, you might think if your device/keys weigh in at under 225g (~8oz), that it will work. But this rating is the force the retractor can resist before the chain gets pulled out. So, on each step, you're going to increase the force applied by a factor of 2-4x. As such, my 100g handset applies enough force to pull the chain out 5-10 cm or so on every step. Couple this with the noise of the chain, and it's downright annoying. As alluded to, the chain type is loud. If you care about hearing a zipper-like noise when you pull it out, get the kevlar one. It hangs down quite a lot compared to the classic design. I attached a dog training collar handset (eCollar ET-300) to it, and the whole ensemble almost reaches my knee, so this means it swings wildly while I walk. Not a fault of the design, just a reality of it. I don't always wear a belt, so I wanted one that would hook to my belt loop. I just wish the overall length could be minimized. Lastly, the supplied keyring is a little too thick for the eyelet in the coupler it is attached to, so it binds a lot, causing the suspended object to get a little kinked up, which results in it hanging cockeyed. This all sound terrible, but this will probably be perfect for a lot of applications.
