water-resistant thin clear fasteners

Thin Clear Fasteners blend into glass or plastic surfaces for a seamless look. No color-matching necessary and positioning can be realigned and changed. More adjustable than glue and water-resistant for indoor and outdoor use. Mini size coins and square fasteners are conveniently sized for small paper crafting projects such as card making, scrapbooking, and party favors. Larger strips and tape are ideal for office use, sign holding and more.

You can know the function via https://youtu.be/aT1wD3eHIU4 

 https://youtu.be/lLelwN7Zg2s