Corner pockets adhere any size document to any flat surface so you'll find hundreds of uses for these handy poly pockets. Each pocket features self-adhesive on the back side so it can adhere to most surfaces - anywhere you need to store full-size pages or small items. Add a corner pocket inside a file folder or ring binder to increase functionality. Self-adhesive corner pockets are made from crystal-clear, durable, acid-free poly with permanent, water-based, acrylic adhesive for years of service.