The Arrow Titanium-Coated Cutting Blade Pack feature a three-pack of 1 3/8" blades for easy use to complete all your projects. These titanium-coated cutting blades have a universal-fit open-back connector for use on most major brands of oscillating tools. The carbide flush-cut blades are ideal for wood, wood with nails, PVC, drywall, and more. The Titanium-Coated Bi-metal Blade Pack features solid and durable bi-metal blades with titanium-nitride coating along the tooth strip to prolong blade life by reducing heat and increasing hardness.