Mature Metal discussion

Hi there, I wanted to share my thoughts on the Queen’s Keep device from Mature Metal. I got mine about three weeks back.

I went with this one instead of the more popular Jailbird model mainly because I felt it had a nicer look, particularly that flat band circling the base of the cage. That said, I imagine my experience would be quite similar if someone were to use the JB.

Sizing was something I pondered over for ages. In my view, getting the fit right is the most crucial part of enjoying any chastity device. If it helps guide you, here’s what I did: I made sure the cage diameter matched exactly with my flaccid cock at its widest point to ensure a snug hold. I also measured my length at different times throughout the day to find out how small it gets when completely relaxed, then picked a cage that was 1/4” shorter than that measurement. Most other reviewers mentioned that the curved end of the device leaves a bit of extra space, but since I wanted constant snuggness, I decided on the shorter size despite the slight risk. Honestly, being short in length isn’t really a problem because we all know flaccid cocks are soft and squishy; even if it’s too small, your cock just compresses into that gap. Diameter is different though—there’s nowhere for girth to go—so make sure you measure accurately there.

For the base ring, I stuck with the dimensions from my old CB6000 device because they were reliable and familiar. If you’re new to wearing a cage, I highly recommend using sizing rings to double-check your measurement. On my previous 6k model, I tried several sizes over a few weeks and found that even the size I thought was perfect could slip off under certain conditions—especially after wearing it continuously for days. Patience is definitely key when finding a ring tight enough to stay put but not so tight it hurts.

So, assuming you’re happy with your sizing like I am (it fits wonderfully snug), how does it feel? Very comfortable indeed. My old CB6k had a wide plastic base ring with square edges that tucked away skin behind it. The QK’s round bar is much thinner—less than half the diameter of my previous one—which reduces friction and exposes more skin underneath. Plus, stainless steel just feels less ‘sticky’ against the skin compared to plastic.

Inside the cage, because my cock fits so tightly, it doesn’t have much room to move around; I’m essentially held in place. It’s always there as a presence, but never uncomfortable or painful during normal daily activities.

Sleeping is fine too, unless you get nocturnal erections, which happen to me occasionally. They wake you up and keep you awake until you can think of something to cool down the sensation! The pressure of your cock trying to expand into that tight space feels quite intense. My main discomfort comes from a burning pain at the back of my scrotum behind the testicles as my cock pushes outward against the device, while the base ring slowly tries to pull them along with it!

This usually passes quickly once you calm down and the pressure eases off. However, if your partner teases you for a long time, that pain behind the base ring can grow increasingly intense.

I also purchased three sizes of blunt anti-pullout pins from MM. Installation was straightforward. The smallest pin is hardly noticeable at all, even when hardening up. The largest one isn’t too obvious in a flaccid state either because your cock yields to its protrusion naturally. But it definitely hurts if you get erect while wearing it due to the rapid buildup of pressure.

As for removing it with a key, others have noted that it might be possible to slip your cock out of the cage, possibly even keeping the pins in place. Personally, I don’t think there’s any way to remove the device from my testicles without squeezing through the gap between the ring and the cage—a maneuver I wouldn’t dare attempt. Also, getting the cock back inside would be difficult if you did pull it out. Because of this risk, I’ve established strict punishments with my keyholding girlfriend that kick in when she suspects or discovers a breach. That’s the best deterrent for me.

In terms of discretion, it’s significantly better than my old CB6k under jeans. The older model always showed a slight bulge, but this one is completely flat. I can even wear tight trousers without any visible outline. This might vary depending on your chosen length; mine is 2.5 inches.

Others have praised MM for their customer service, and I share that sentiment—no complaints here. My device arrived slightly earlier than the initial estimate promised, and the quality is perfect.

I’ve posted a photo of my new cage along with other updates on my Tumblr page: perpetual tease.

Hope this review proves helpful! Good luck in your quest for chastity!