Mead Trapper Keeper 2-Pocket Folder, Blue (72193) Trapper Keeper 2-pocket paper has three pre-punched holes that allow it to easily fit into your three ring binder. Fully functional both inside and outside of a 3 ring binder. Reinforced holes add durability while 2 vertical pockets securely trap papers & keep them in place. Holds standard letter size sheets. Header to write your name and subject on front cover.