Let’s talk about the WANLIAN lock stopper—a gadget that promises to keep kids, pets, and burglars at bay while being tool-free and adjustable. After testing it on my sliding balcony door (and nearly losing my sanity with my toddler’s Houdini acts), here’s the real deal.

The Good: Installation is a breeze. No drills, no screws—just slide it onto the track, twist the hex key, and boom! It grips like a champ. The rubber padding? Genius. Zero scratches on my window frame, and no screechy metal-on-metal sounds. Plus, the adjustable width (10-60mm) fit my chunky 90s-era sliding door with room to spare.

The Bad: That “sturdy” aluminum alloy? Debatable. If your window track is vinyl or thin aluminum (like mine), overtightening can warp it. I had to play Goldilocks—tight enough to stop my kid, loose enough to not bend the track. Also, the hex key feels like it’ll vanish into the void of lost socks after two uses.

Pro Tip: Works BEST on solid wood/steel tracks. For flimsy tracks, pair it with a secondary lock if security’s a priority. And yes—measure your track thickness first! My neighbor’s ultra-slim track left this thing useless.

Verdict: A solid 7/10. Great for quick fixes (and pet-proofing), but don’t rely on it solo for heavy-duty security or delicate tracks.