The BBsecure Baby Gate Banister Adapter is perfect for installing your baby or pet gates on stairway, patio, and doorway posts without drilling or causing damage. Ideal for families looking for a rental-friendly solution, it fits both square and round posts from 1 1/2" to 3 1/2" and 1 3/4" to 3 3/8" respectively. Whether you are blocking off busy kitchen entrances, open living areas, or outdoor patios, this adapter keeps gates stable and helps manage areas for children and pets. Compatible with mesh, metal, and retractable gates, it provides a versatile installation for any home setting. Easy to install in minutes, it helps maintain an organized and stable space while preserving your posts.