Hanging Pockets offer extra capacity & SureHook technology with revolutionary, built-in tension springs. This design makes sure pockets stay on track, slide more easily & don't buckle under pressure. Full-height, expandable gussets prevent folders from getting caught on folder rails. Three-sided construction protects legal-size documents & assures papers stay in the folders. Tear-drop slots on front & back panels accept tabs (not included) in five positions. Folder is made of 11 point paper stock & expands 3-1/2". The top of the folder is reinforced with polylaminate for added durability.