The bi-metal HSS hole saw set is delivered in a sturdy aluminum case that protects the blades and makes them easy to transport on site. The set includes a wide size range from 19–133 mm, making it versatile for cutting metal, wood, and plastic materials. The package includes both a large and a small arbor as well as a 300 mm extension, allowing easy access to deeper or harder-to-reach work areas. The bi-metal blades offer long life and efficient cutting, and the saws' replaceable teeth ensure a clean and even finish. A 38 mm cutting depth is sufficient for most installation and pass-through tasks. Easy plug removal makes work faster and smoother.