Package Information--Package includes 2pcs wooden blocks, 2pcs screw stick, 2pcs wing nuts, 2pcs nuts, 4pcs spacers that you can assemble into a binding machine. Size Information--The wood block is 380mm/15inch long, 38mm/1.5inch wide, 22mm/0.87inch high and the screw is 160mm/6.3inch long, you can use it with the rightSize of books for home DIY book binding. High Quality Material--Made of high-quality wood and screw fittings made of high-quality metal, the binder is compact and practical, and won't take up much space when not in use. Easy to Use--Bookbinding press hardware allows for multipleSizes of books to be used, you can adjust theSize as needed to give you the DIY fun of bookbinding in a traditional and practical way. Usage--Bookbinding press are great for doing DIY book book making, use the binding machine to press the book side seams and apply glue to complete the book binding.