I love being locked up and relentlessly fucked by a machine, but my attempts at DIY bondage frames have so far been slightly dissatisfying. Mostly, when I design something for myself, it ends up being useless for the wife. So I’d been on the lookout for something adjustable for a while—a proper metal bondage frame to lock myself or my partner down tightly.

The YingYu K9 bondage frame fits the bill precisely, and you’ll find it on AliExpress for $220 including shipping at the time of writing (though that’s with a supposed discount of 40% off the normal price). That’s ridiculously good value for some serious bondage hardware, so what’s the catch?

What’s In The Box

Inside the discreet cardboard box, you’ll find:

  • The main frame
  • Front extension
  • Chest platform
  • Neck restraint
  • Hand restraints
  • Leg restraints
  • Fucking machine connector
  • Bag of bolts and bits
  • Length of rope

All the necessary bits and tools are included and nothing missing from our package. One of the eye bolts for the rope was slightly bent, but it’s not a huge deal and something I can forgive on hardware at this price point.

 

Putting It Together

Unscrew and pull out the extension rod that comes inserted already into the main frame, so there’s room to then insert the other extension rod into the other end. This should have the black plate facing upwards—the same direction as the legs for the chest platform. You should now have one large black piece with two shiny silver extension pieces on either end.

Fit the wrist restraint bar to the black plate on the front extension using the two short bolts. The wrist restraint bar sits on top of this, with the bolts underneath. (It’s turned upside down on the photo below, which you’ll need to do to access the bolts)

You might notice one of the wrist restraints is a little loose and can be detached from the bar. This is a safety feature, and if you don’t want it, you can secure the locking pin in place with the included padlock. Otherwise, leave the pin loosely inserted from the top of the bar. This is great for solo play and self-bondage, as it enables you to escape while still feeling properly confined.

Next, move on to the chest platform, and insert the padded neck restraint into the open end, making sure to unscrew the securing bolt by hand first.

Insert the legs of the chest platform into the main frame. You may need a little force here if they’re slightly misaligned.

Once in, use the two long bolts and hand nuts to lock in the desired height.

The leg restraints slide on and secure with a hand-tightened bolt in the desired position. Even fully tightened, we found the bar could still rotate slightly, but in practice, it doesn’t matter and it doesn’t ride along the frame.

Finally, if you bought the optional fucking machine attachment, use a hex tool to undo and remove the front bar of your fucking machine, then insert the bar of this adaptor instead.

The restraints are built-in to the bondage frame and made of thick, strong, secure brown leather. While you might prefer a simple attachment point, I’d argue that this design gives more a satisfying restraint, with less freedom to wriggle around. On the other hand, if you break these (unlikely, but still), they’ll be harder to replace.

What’s Great About the YingYu K9 Metal Bondage Frame?

  • The optional fucking machine attachment fits the HiSmith Premium perfectly (my review at CaraSutra), so your machine won’t run away and the locked victim will feel the full force.
  • It accommodates a wide range of body sizes, and you can scale up or down the sub’s comfort level.
  • The basic box frame construction is used on other YingYu bondage furniture, so you could combine parts from elsewhere if you want a variation on the design.
  • The restraints are strong leather, and built-in.
  • Discreet shipping. The customs label said “massager”, but there’s nothing else at all on the plain cardboard box to suggest something remotely sexual.

What Could Be Better?

  • The wrist and leg restraints are of a fixed width, so you can’t spread your sub’s legs or hands further apart.
  • It’s not collapsible, and the footprint is about 4ft by 2ft—so you’ll need the storage space to keep it when not in use; or your own private dungeon. Of course, you could deconstruct it, but that’s far more effort than I care for.
  • Shipping is all over the place. While this item arrived within two weeks of the AliExpress 11/11 sale, the other item we ordered from the same seller took an extra week or two. We had opted for the “from France” product variation in the hope that would arrive more quickly to the UK. In reality, it was still shipped from China. The variation of warehouse location seems to just be a trick to manipulate the search listings. Direct from China shows as more expensive, but with free shipping; from France showed as $100 cheaper, but with a $100 shipping fee. So the exact same total price. The shipping fee, however, isn’t shown in the search listings, and only the cheaper of the two prices is shown. This is definitely shady listing practice, but common practice on AliExpress. If one seller does it, they all have to do it, or they’re losing eyes on the product.

Overall, I’m pleased with our purchase and using it with the HiSmith Premium fucking machine is a fantastic experience. It securely restrains, while still being comfortable for longer sessions.

That said, after a few months, I found myself wanting to replace the padded chest rest with something larger, softer, and covered with PVC. And it turns out that it was a lot easier than expected, with a handful of screws securing it to the main metal plate.

Here’s the finished product, featuring my custom-made PVC bodyrest:

In addition, I designed and printed a Vac-U-Lock adaptor to slide onto the 1-inch square tube around the head. Here it is in action, and you can download it on this page.

Check out the K9 bondage frame and more at AliExpress.