Bi-Metal Hole Saw Kit, 28 Piece M42 Steel Hole Saw Set with 3/4" -4-3/4" (19-121mm), General Purpose Hole Saw Blades in Case with Arbors

Hole saw kit is a versatile cutting tool set designed for drilling large-diameter holes (typically 20-150mm) in various materials including wood, metal, plastic, and drywall. The kit usually includes multiple hole saws of different sizes, a universal arbor (mandrel), pilot drill bits, and sometimes additional accessories like reducers or extension bars. The cutting edges are often made of high-speed steel (HSS) or bi-metal (HSS teeth with carbon steel body) for durability, while premium versions may feature carbide tips for masonry or abrasive materials. Commonly used in construction, plumbing, electrical work, and DIY projects, hole saw kits provide efficient material removal with clean cuts. Some kits come with a sturdy storage case for organization and portability. Key advantages over standard drill bits include faster cutting of large holes and reduced power requirement compared to spade bits or forstner bits.