Feature:1. EXCELLENT QUALITY: Made from excellent TCT carbide(carbide tipped cutters), high grade Ti plated cemented carbide tooth, ensuring high hardness, rustproof, sturdy and long lasting2. UNIQUE THREE BLADE DESIGN: This TCT hole saw teeth is designed with three blade, include outer blade, middle blade, and inner blade, making it more incisive and efficient, ideal for cutting hard metals3. MULTIPURPOSE TOOLS: This hole saw set can be applied to bench drill, magnetic drill, gun drill, drill percussion and so on. Perfect for hard metal, stainless steel plate, square tube, iron, cast iron, wood, FRP and other general sheet metal4. HIGH ACCURACY AND EASY TO USE: TCT carbide steel teeth for fast cutting of clean, round holes. Suitable for hand held electric drill, stand motor driven drilling machine and mobile ribbon type magnetism drilling machine5. PACKAGE INCLUDE: Contain 6pcs TCT hole saw set, 2pcs hex wrenches, all the drills are packed in an exquisite storage box, which is definitely a perfect gift to you and your familySpecification:Item Type: TCT Hole Saw KitMaterial: CarbideHole Opening Diameter: 16, 20, 22, 25, 30, 32mm(5/8in, 25/32in, 7/8in, 1in, 1-1/4in, 1-3/8in)Hole Opening Depth: Approx. 25mm / 1inShaft Diameter: 3/8in.Package List:6 x Drill Bits2 x Hex Wrench(excluding quantity in set)1 x Storage Box