Kitty Korner Cat Door (Righthand Kit) The Original and Patented - Kitty Korner Slidelock Hinge Designed to Work for Interior Doors. Don't be Fooled by The imitators Review
By Marcus Bell · Dog nutrition editor · Published 2026-06-06 · Updated 2026-07-02
The Kitty Korner Slidelock is a patented hinge style cat door built specifically for interior doors, and its 4.3 star rating across 244 reviews shows it holds up well for owners who don't want to cut a hole in a wall.
Owners who want to let a cat pass through an interior door, such as into a laundry room or litter box space, without a separate hole cut into the door itself.
Skip if
You need a door for an exterior wall or a thicker door, since this is rated for interior doors up to 2 inches thick and is a righthand kit only.
Breed size Extra Small
Priced 13% above the category median ($31.95 across 49 tracked models)
Our scorecard
4.2/5overall
Owner rating4.3/5
4.3 average across 244 owner ratings
Popularity1.6/5
244 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["The Kitty Korner Slidelock Cat Door is a plastic hinge mounted door built to work with existing interior doors rather than requiring a hole cut into the door panel. Made by Wise Donkeys under the Kitty Korner Door brand, it measures about 14x1 inches and fits doors up to 2 inches thick. It's sold as a righthand kit and is designed specifically for cats.", 'This model uses a simple flap style closure and comes in white plastic construction. At $35.99, it sits at a mid range price point for a specialty door style, reflecting its patented slidelock hinge design rather than a basic cutout flap.', 'With 244 reviews and a 4.3 star average, plus about 100 units bought in the past month, this door has a steady following among owners looking for a non-invasive way to give a cat access to specific rooms.']
Pros
No cutting required since it mounts using the door's existing hinge
Solid 4.3 star rating across 244 reviews
Fits interior doors up to 2 inches thick
Backed by a 30 day money back satisfaction guarantee
Cons
Righthand kit only, so it won't fit every door orientation
Limited to interior doors, not built for exterior weatherproofing
Plastic construction may feel less sturdy than metal framed options
Specifications
Breed size
Extra Small
Performance notes
The slidelock hinge design replaces the standard door hinge to create a small flap opening, and at 14x1 inches it's sized for cats rather than dogs, with a maximum door thickness of 2 inches.
What buyers say
A 4.3 star average from 244 reviews and roughly 100 purchases last month suggest a smaller but reliably satisfied customer base for this specialty interior door style.
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