This and similar products require a design update. The threshold for forming a tubular rod through the hole is too high. I stumbled over it and a week ago I fell very badly - bruises on my legs and a hematoma + a bruise on my ribs and aching limbs. Fortunately there are no broken bones, but others with weak bones may not be so lucky. I'm 70+! Consider using a solid flat bar instead of metal at the base of the device. I have disassembled this unit and want to return it BUT the return period has recently expired. AMAZON, please comment as soon as possible. Dennis Simmons
๐ช NAMSAN Pet Door for Screen Door - Doggy Door Protector Slide with Magnetic Flap - Automatic Close & Lockable - Cat Door Screen Gate
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Optimal Cat Door with Integrated Grooming Brush - Spacious Access for Adult Cats ๐ฑ up to 20 Lbs - Effortless Installation, Detailed Instructions, Secure Screws & Screw Caps Included
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