Martin Yale P6400 Desktop Letter Folder; Folds Up To 36 Letters a Minute, 2200 Sheets an Hour; Hand-fed, Folds 1-3 Sheets and Accepts Stapled Sets Perfect for small jobs, small businesses, home offices, churches or associations Adjusts for either letter or half fold Hand-fed, folds 1-3 sheets and accepts stapled sets Folds up to 36 letters a minute, 2Can be used with 8 1/2" x 11" paper, 16lb to 24lb. bond, 60GSM to 90GSM200 sheets an hour