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Letter And A4 Fold-Gauge Bone Folder
A 169 x 22 mm bone folder with a hook stop at one end. Notches set at exact fold distances let you tri-fold or half-fold paper square without measuring: the front edge has 93.1 mm (US Letter ÷3) and 139.7 mm (Letter ÷2), and the back edge has 99.0 mm (A4 ÷3) and 148.5 mm (A4 ÷2). Hook the stop over the paper edge, nick the paper at the notch, fold, then crease with the 1.6 mm tapered tip. A 6 mm hole lets you hang it on a pegboard.
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