Mature Metal

Watchful Mistress

SKU 122 Category Tag


Lock Options

OPTIONAL – 3 sets of pins for one price. 3 pins per set. 3 different styles. Mix & Match.

Punishment Pin 1

Punishment Pins 2

Punishment Pins 3

The Watchful Mistress lives up to its namesake. It features an open front design, it is exceptionally easy to clean without the need to remove the device. Its lightweight and compact nature ensure discreet wear under clothing, making it perfect for continuous use throughout the year. The device is so comfortable you’ll forget you’re even wearing it.

This device is great for long distance and/or online relationships as it is super easy to clean without needing to removing the device.

Punishment Pins and Security Screw options are available for this item, but it must be at least 1 3/4″ for Punishment Pins.  

Build time is 6-8 weeks from date of order.

Please email your rush request to, an invoice will then be sent to you.   Your build time will start the day the invoice is paid.  Mailing time is not included in the build time.
The prices are in addition to the cage order.
1-2 WEEK BUILD TIME $450 $350 SALE
2-3 WEEK BUILD TIME $225 $175 S


Item is constructed of 1/8″ X 1/2″ flat bar and 1/8″ round rod to construct the cage on the tip. Base ring is made from 1/4″ round bar.
All parts are handmade.  The shortest length the Watchful Mistress can be to have the side bars is 2″.  If your length is shorter, the side bars will be eliminated.  Your length must be at least 1 1/2″ to make a Watchful Mistress.
Made of 316 and 304 stainless steel. 316 stainless steel means that it will not corrode in chlorinated or saltwater pools. 

If you choose the security screw option, it will come with two keys and two screws.

Weight 5.3 OZ depending on size.

Lock not included.  Please know that a proper size lock should sit sideways.

If adjustments are needed in the future, we will need the
cage and ring returned.

Your device will be mailed USPS priority mail (no signature required) within the US or USPS priority express international/UPS for orders outside the US.
You are responsible for ALL duties and taxes issued by your country. Please check with your local postal service if you have any questions about your duties and taxes.

Cage Inside Diameter

1" (25.4 mm), 1 1/8" (28.6 mm), 1 1/4" (31.8 mm), 1 3/8" (34.9 mm), 1 1/2" (38.1 mm), 1 5/8" (41.3 mm), 1 3/4" (44.4 mm), 1 7/8" (47.6 mm), 2 1/8" (54.0 mm), 2 1/4" (57.1 mm), 2 1/2" (63.5 mm), 2 5/8" (66.7 mm), 2 3/4" (69.8 mm), 2" (50.8 mm) ​​

Base Ring Inside Diameter

1 1/4" (31.8 mm), 1 3/8" (34.9 mm), 1 1/2" (38.1 mm), 1 5/8" (41.3 mm), 1 3/4" (44.4 mm), 1 7/8" (47.6 mm), 2" (50.8 mm), 2 1/8" (54.0 mm), 2 1/4" (57.1 mm), 2 3/8" (60.3 mm), 2 1/2" (63.5 mm), 2 5/8" (66.7 mm), 2 3/4" (69.8 mm), 2 7/8" (73.0 mm), 3" (76.2 mm)


1 1/2" (38.1 mm), 1 3/4" (44.4 mm), 2" (50.8 mm), 2 1/4" (57.1 mm), 2 1/2" (63.5 mm), 2 3/4" (69.8 mm), 3" (76.2 mm), 3 1/4" (82.5 mm), 3 1/2" (88.9 mm), 3 3/4" (95.2 mm), 4" (101.6 mm), 4 1/4" (107.9 mm), 4 1/2" (114.3 mm), 4 3/4" (120.6 mm), 5" (127.0 mm) ​​


1/4" (6.3 mm), 3/8" (9.5 mm), 1/2" (12.7 mm)


Round, Oval

7 reviews for Watchful Mistress

  1. Geoff

    I got my first WM 14 months ago. I wore it 24/7 for the first year. Then to celebrate, my KH got me a PA.

    The wonderful folks at MM made me a new WM with the same specs as the original but customized to capture the PA jewelry and make pull-out impossible. The recommended 6-week healing process for the PA was one of the most uncomfortable periods of my adult life. I’m now happily locked in again, this time with the PA all locked to the cage. We don’t foresee any reason to remove it again until we eventually go to a full Apadravya piercing.

    I noted that some of the reviewers removed their cages for air travel. I have been through TSA checkpoints 8 or 9 times while wearing my WM, both before and after the PA, and have never tripped the metal detector. I have even been through the whole body scan, and no TSA agent has commented at all.

    I can’t explain why this is, and your mileage may vary, but I never even give it a second thought when I travel now.

    The next time I travel internationally, I will probably have to go naked.

  2. locked4her55

    Have worn a MM Jailbird for just about a year now. Wanted to try something different and decided on the Watchful Mistress. Both my wife and I chose the JB due to the openness and ease of cleaning. Wife loved the ability to have lots of access to tease me.

    I wanted to be able to change it up sometimes to limit her access (of course with her permission). The WM does just that. I truly didn’t think a chastity device could feel any more comfortable than my JB. Well the WM has proved that wrong. I go hours at a time and forget I’m wearing it.

    Both my JB and WM are hand crafted masterpieces and the customer service at MM is second to none. You won’t be disappointed with any chastity device from Mature Metal.

  3. Locked Bob

    Well, it’s been a year and out of lockup for only 2 weeks this past year. Positively wonderful device. Would have not had the 2 weeks release except I hd to travel via the miserable airline and that meant a social visit with several TSA agents, and I didn’t want that experience…. so I went “naked” without my new friend the QK…! I really felt naked without it! If you are trying the cheap… no CHEAP stuff. save your money, buy aMM device, pocket the savings and go have several good dinners with the control agent (yur wife or SO) and have many happy experiences and FUN… I really don’t ever realize it is on except when it is restroom time… and then I simply sit… besides, it is comfortable to sit there! PLEASE, SAVE YOUR MONEY, purchase a MM product and use the savings for your pleasure and hers…It is important to really tighten the security screw… It will work out if you don’t…Mine did the first week, and boy was there an explanation problem! getting the screw really tight is positively a must…. that is my only complaint and is simple to fix! Well… here’s to another year (OMG) of fun” being secure, happy and frustrated…LOL I love it I love it I love. get one, enjoy it and thank all of us caged victims who speak wisely…MM IS THE ONLY WAY TO GO… The folks at MM don’t know who is posting this and there are no bribes coming to me for my “brief” comments… Mrs Locked Bob is coming in with a small tube of something and an “evil” eye… Will write again next year…. enjoy your new lifestyle fellows… Gals, tease the heck out of your new slave and victim! bye bye!

  4. biggar

    Though I purchased our device from ChastityHeaven it is still the Mistress or sometimes called the Watchful Mistress. I originally ordered The PetTrap but when it came time to make it they said because of my small measurements( 1 3/*’ ID X 1 3/4″ long) they couldn’t build the PetTrap and offered the Mistress instead. We have had it a little over a year now and are very satisfied with it! One of us is way more and more often than the other! It is very true what the homepage said: “You cannot and will not be able to get an erection in our devices!” and it’s very true. The most I achieve now is a little swelling and no discomfort at all! I highly recommend one of these devices to anyone serious about male chastity!

  5. Brian

    I purchased the Watchful Mistress a while ago and I can say that It is very comfortable. I don’t notice it under my clothes exept it won’t let me get hard at all. This is my first devise and I would recomend it for anyone that is just starting

  6. Locked-up

    I received mine about two months ago. I had to send it back because I incorrectly measured myself the first time I ordered it. They were GREAT about making the adjustments I needed and had it back to me within a week and a half. The craftsmanship is second to none. I can’t even feel that I’m wearing it unless I become aroused; at which point the device gets the job done! I went through numerous plastic devices and generic metal ones from eBay before buying this one. Don’t waste your money on the generic ones! Get a custom made one from MM and you won’t regret it! I’m already looking into getting the Pet Trap in addition to what I already have because I’m so pleased with the craftsmanship and want another device so I can switch it up and have something to wear when cleaning the other one.


  7. Mr.Stephen

    We fooled around with the plastic and silicone devices and they always came off so I thought there was little risk in ordering the Watchful Mistress. We got the locking option plus security screw. As days melted into weeks and weeks into months, I have been left to ponder my Mistress’ genius in allowing me to fall into this trap. Meanwhile MM has been wonderful about refitting and miscellaneous questions to ensure that I never escape! I highly recommend this workmanship and unparalleled level of service! I am so caged, for better or worse!

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