297mm - Width of A3. 148mm - Width of A5. 210mm - Width of A4. 3D printed book binding punch guide & cradle available in 3 sizes. Punch holes are spaced 1cm apart and centred in the punch guide, the holes are suitable for a 2mm awl.
NBEADS Signature Punching Tool for Bookbinding, Bookbinding Punching Cradle with Aluminum Piercing Guide Book Binding Tools Guide Set for DIY Crafts Notebooks Journals Planners Books
SCREW PUNCH NONAKA Bookbinding Leather Fabric Brand New Sealed Uk Seller Free pp
SCREW PUNCH NONAKA Bookbinding Leather Fabric Sealed Uk Seller Free Tracked pp
BENECREAT Wood Bookbinding Punching Tool, Hand Account Binding Kit Bookbinding Supplies with an Awl and Cradle for DIY Crafts, Notebook, Journals, Planners
BENECREAT 23.5cm Wood Bookbinding Punching Tool, Pine Book Binding Cradle, Book Binding Supplies for DIY Notebook Journals Planners, Bookbinding Beginner Tool for Equal Distances
BOOKBINDERS 2 x BONE FOLDING LEG Bookbinding Craft BOOKBINDING Bonefolder