One-Way Purrtect

Introducing the "One-Way Purrtect" - a simple yet effective 3D printed insert designed for Kwikset door knobs. This gadget allows the door knob to turn in only one direction, making it a great solution to keep curious cats from opening doors. Ideal for lever-style knobs, it's easy to install and requires no modifications to your existing hardware. Say goodbye to unwanted feline escapades and hello to peace of mind with this cat-proofing essential. Perfect for pet owners looking for a hassle-free way to secure rooms and keep their furry friends safely inside!

Before we installed these devices, our cats were master ninjas, sneaking into the kids' bedrooms at all hours and waking them up with their antics. The constant interruptions became a nightly ritual we could do without. With this handy device in place, we can now leave the doors unlocked at night, allowing the kids to sleep soundly without any surprise visits from our furry friends. It’s also been a game-changer during the day, keeping the cats out of the pantry and laundry room, where they had a knack for causing mischief. Finally, our home is a little more peaceful and a lot less chaotic!

To install the One-Way Purrtect, start by removing the door knob. The device slips over the central turning post (you know, the thing that rotates to pull the latch in) and fits snugly over the screw holder posts. Just look at the pictures. Once in place, test the direction the knob turns to make sure it’s going the correct way. In our case, the cats would pull the lever down, so we installed ours so the lever had to be rotated up to open the door. If you find that the lever turns the wrong way, simply remove the printed part, rotate it 180 degrees, and reinstall. After that, just put the knob back on the door as you would normally, and you’re all set!

Keep in mind, the One-Way Purrtect isn’t a high-security device. While it’s great for deterring cats, a determined or particularly hefty feline might still be able to force the lever down. If you're using this to keep a dog out of a room, they might also manage to push the latch open with enough effort. In these cases, the spring inside the knob could get bent out of shape. If this happens, you might need to bend the spring back into position. However, repeated forcing could eventually cause the spring to break, so it's best to monitor the situation and ensure it's working as intended.

This has been tested on interior Kwikset door levers that either have no locking mechanism or with a keyless locking mechanism. It may work on other styles and brands.

Introducing - Version 2!

Well it turns out my kids weigh more than the cats, even the fat one. The cat is fat, not the kid. Version 2 of the purrtect works against the central turning post instead of the flimsy spring. Only time will tell if my kids are untrainable.

Install the standoffs first, they're needed to ensure the main body of the purrtect doesn't block the locking mechanism. Then drop the main body on. Flip it over if the knob turns the wrong way.

Update

After using both designs for a few weeks, I can say that the V2 update is far superior to the original design. It was fairly easy to bend the springs on the original design, which would let the door open and will eventually lead to spring failure. I don't think that the cats could have accomplished this, not even my fat one, but my ham sized fists sure did a good job of it a couple of times. My kids also liked to test if they were “stronger than a cat” so that was a no-go. The V2 design requires far more force to turn the handle the wrong way, so much that I would declare the original to be obsolete, if not straight up worthless.