• Made with heat-treated carbon steel, these hole saws offer durability and resistance to oxidation. • Ideal for drilling holes in doors, ceilings, and pipes, they are suitable for cork boards, PVC, and plastics, but not for hard boards. • Includes a compact and sturdy storage case for easy transport and organization of tools. • The set includes 12 saw blade sizes: 19, 22, 29, 32, 38, 44, 51, 64, 76, 89, 102, and 127 mm, as well as a large adapter, a small post, a special gasket, and a hex key. • Compatible with manual, impact, cordless, and flat drills, this kit is an excellent helper for woodworking.