Hollander's Complete Round Back Kit includes pre-cut board pieces for a book with dimensions of 5.5" (h) x 5"(w) x 1" (d) book, pre-cut decorative paper and book cloth (papers and cloths may be used as a pattern if preferred), high quality Somerset text pages with deckle edges (200 page book), thread, needle, headbands, spine materials, PVA standard glue, PVA thick glue, bone folder, and instruction booklet. The round back differs from the flat back in that it allows you to add many more signatures and has a more complex spine construction. Round Back books are designed to be used for books with a spine thickness greater than 3/4". You will need: Brush, scissors, and medium weight hammer. All other supplies are included.