12 Cartridges = Up to 12 months of shaves per pack. Anti-theft. Anti-vol. Up to 20% saving per refill (Compared to per-cartridge cost of 4-ct pack, based on manufacturers cost to retailer. Pricing is at the sole discretion of the retailer). All Fusion 5 Cartridges fit all Fusion 5 handles. Precision trimmer. 5 Blades. Microfin skin guard. Gillette - The best a man can get. www.gillette.com. www.pg.com. Comments? 1-800-GILLETTE; www.Gillette.com. Gillette Fusion 5 Proshield. Gillette Fusion 5 Proglide.