What's the advantage of adjustable shelves in a bookcase?

Adjustable shelves use a pin-and-standard system that lets you reposition shelf height in 1"–2" increments to fit items of different sizes — a huge practical advantage over fixed shelves that are permanently set at the factory. Commercial bookcases typically have adjustable interior shelves and fixed top and bottom shelves. FindOfficeFurniture.com's bookcases all feature adjustable interiors — call 888-719-4960 for specifics.