Martin Yale 959 Heavy-duty AutoFolder Paper Folder: first-rate Martin Yale 959 letter folder machine is sure to win in flexibility category. This heavy-duty paper folder is equipped with a friction-fed feed system, as well as convenient speed control and skew adjustments. speed can easily be modified and enables folding of different paper weights. This friction-feed letter folder machine can handle paper as light as 9 lb onion skin and heavy as 110 lb Bristol index. Consistent, accurate folds are dependable, due to entrance rollers with angular control adjustments. This folder handles up to 14 x 20 inch paper and has simple modification. There is adjustable fold range, with custom folds as an option. Martin Yale 959 has a fast speed of 18,000 sheets an hour. versatility of this heavy-duty paper folder makes it excellent for any application, from newsletters to thicker wedding invitations. ;Angular control adjustment for entrance rollers lead to more aligned folds.;Accommodates wide range of paper, even as light as 9 lb onion skin.;Slitting, scoring and perforating are easy options.