A diamond hole saw is a type of saw blade specifically designed for drilling holes in hard materials like stone, ceramic, and glass. The blades of a diamond hole saw are coated with industrial-grade diamonds, allowing them to cut through even the toughest materials.
Because they are so durable, diamond hole saws are often used for making large holes, such as those needed for installing plumbing or electrical lines.
While they are more expensive than traditional drill bits, diamond hole saws can save time and effort when drilling through tough materials.