All the protection of a traditional document sleeve with the added security of the Corner Lock™ feature. Durable plastic sleeves are sealed on two sides to allow easy access to documents while keeping them looking fresh and sharp. Special Corner Lock™ fits snugly over the clear front cover to ensure that your documents don't accidentally fall out. Clear front cover aids in quick identification of documents. Durable, yet lightweight and portable; nonstick poly material won't lift print. Sleeves hold up to 20 sheets of 8 1/2 x 11 paper.