Bi-Metal Construction: The 2-7/8-inch hole saw is made from bi-metal, combining high-speed steel teeth with a durable steel body for superior cutting performance and long life.Variable Pitch Teeth: Features variable pitch teeth that provide smooth and efficient cutting through a variety of materials, including wood, plastic, and metal.One-Piece Arbor: The hole saw comes with a one-piece arbor attached, making it convenient and ready for use right out of the package.Versatile Use: Ideal for cutting holes in wood, drywall, plastic, and thin metal, making it perfect for electrical, plumbing, and construction projects.Durability: Designed to withstand tough cutting conditions and deliver reliable performance over time, even in demanding applications.Precision Cutting: The bi-metal teeth ensure precise, clean cuts with minimal burring or need for finishing.Easy to Use: Compatible with most standard drill chucks, making it simple to install and use with your power drill.