Carbide edged blades are the longest lasting blade on the jobsite. Improved durability and wear makes them last 5 times longer than competitive utility blades. With a carbide edge only it allows the rest of the blade to remain flexible. 5-pack. Stanley CARBIDE Utility Blades last more than five times longer than the competition due to groundbreaking Carbide Blade Technology. These CARBIDE utility blades are designed to deliver increased blade life maintain first-cut sharpness and offer snap resistance - three key factors that today s professionals demand. These breakthrough utility blades provide heavy users the long awaited durability needed to keep cutting through a variety of applications including roofing drywall ceiling tile installation and other building products that prove challenging for traditional blades. Stanley s CARBIDE Utility Blades are uniquely manufactured by way of a patent-pending process that uses high-powered laser technology to deposit tungsten carbide powder onto the edge of every blade. Diamond wheels are then used to grind a sharp finished angle on each CARBIDE blade. This high-speed process creates a durable and long-lasting edge while maintaining a flexible steel blade body.