The Martin Yale P6400 letter folder machine, very similar to the P6200, is portable and user-friendly, with a smooth design. Folding is effortless; the paper folder does all the work. It produces the letter fold within seconds, ready to insert into a standard # 10 envelope. Up to 3 stapled sheets can be fed into the machine with no problem. 1 to 5 sheets can be folded into to half fold, as well. The non-skid feet make this folder ready for table tops in office environments. The P6400 desktop paper folder folds 2,200 sheets an hour (36 letters per minute). 16 to 24 lb is allowed for, size 8 1/2 x 11. It is also easy to fix paper jams, though it is not probable that they should arise. Paper is automatically and quickly folded once fed into the unit. This paper folder is a good match for settings that execute smaller amounts of folding.