GBC Binding Spines / Spirals / Coils, 1-1/4" Diameter, 250 Sheet Capacity, 2:1 Pitch, WireBind, Black, 100 Pack (9665210) WIREBIND SPINES  Permanently bind documents with these professional spines when presentation and quality are primary concerns. Ideal for busy corporate offices, universities and accounting firms. 32-HOLE BINDING  WireBind spines bind pages through 32 holes, with a steady 2:1 pitch, which creates two loops per inch. 250-SHEET BINDING CAPACITY  Sturdy black spines are the perfect choice for large projects. With a 1/4 diameter, they securely hold 250 pages, giving you plenty of space for your work. 360-DEGREE CAPABILITY  This sturdy binding allows 360-degree rotation. Spines also allow pages to lie flat for reading, note-taking and photocopying. Great for creating study guides. PERFECTLY PERMANENT  Attractive, black wire spines give projects a strong, permanent binding with a neat, high-quality appearance. They're an ideal combination of precision and permanence. CONVENIENTLY COMPATIBLE  Spines are designed to work with the GBC W15 WireBind Binding Machine (7708147) for simple, hassle-free binding. 100 PER PACK  A pack of 100 spines ensures long-term productivity for all of your binding projects.