Convenient CombBind Standard Spines are a great choice for everyday binding needs. One of the most popular binding options, CombBind is suitable for a variety of situations. They're an ideal choice for busy corporate settings. 19-hole plastic spines are strong, giving you a secure binding. Durable spines won't scratch, chip, peel or discolor over time. Shiny black spines provide plenty of space to house your printed projects, securing 500 pages with a 2” diameter spine size. They're a great choice for school projects and any other occasions when you'd like to preserve special memories. Easy-to-use spines are designed for use with all CombBind Machines (sold separately). Sleek spines provide an elegant presentation when used in with GBC ClearView front covers and Regency back covers. A box of 50 black spines allows long-term productivity for your most important projects.