Review on 🔒 Secure Your SUP with Airhead Suction Cup Tie Downs - 2 Pack by Robert Layne

The lock does not make it stronger. I have a rod holder for my car, it's basically a seat belt with velcro to hold the rod, the suction cup can't even hold 6 rods without losing suction. Replaced with the Stanley version and they are MUCH better! Yes, I put it on regular glass without tint film and stickers on the glass. Yes, I cleaned the glass surface and removed the plastic wrap from the suction cup. You don't keep the suction power with a light weight!