The "Grand Prix" line was primarily designed for the office. It includes four models: GX-1, GX-2, GX-3 and GX-4. Identically built, they differ only in dimension and capacity. All are equipped with heavy-duty caster base and Sargent & Greenleaf 6730 combination lock (key change). Model GX-1 is the smallest of these safes and features an adjustable shelf. Its small size makes it the perfect model for home protection. Model GX-2 is slightly larger making it just right for small businesses. Model GX-3 is ideal for an office or factory, with its two adjustable shelves. Model GX-4 is the roomiest of the GX Series with three adjustable shelves and built to accommodate EDP printout handing bars