【Top Quality】Made from high quality TCT Carbide( Tungsten Carbide Tipped Cutters), High-grade Titanium-plated cemented carbide Tooth, ensuring its high hardness, rust proof, sturdy and durable； | 【Size】Cutting diameter：3Inch(76mm), Cutting Depth: 1Inch, Shank Dia.: 2/5 Inch(10mm) , perfect for drilling Hard Metal; | 【Unique Three-blade Design】 This TCT hole Saw teeth designed with Three-blade, Include outer blade, middle blade, and inner blade, making it sharper and more efficient, ideal for cutting hard metals; | 【Multipurpose Tools】This Carbide Hole saw set apply 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, F.R.P and other general sheet metal；Note: Cannot be used for concrete, tiles and stone. | 【High precision 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 machine; | 【Package】Include 1pc T.C.T Hole Saw Cutter and 2pcs Titanium-Plated Pilot Drill bit，each hole cutters are individually cased in plastic box and each bit is also oiled (Prevent rust).