About this item: [Top Quality]Made from high quality Carbide( Tungsten Carbide Tipped ), High-grade Titanium-plated cemented carbide Tooth, ensuring its high hardness, rust proof, sturdy and durable; [Size]Cutting diameter:16mm (5/8inch),19mm(3/4inch), 22mm(7/8inch), 25.5mm(1inch),29mm(1-1/8inch), 32mm(1-1/4inch), 35mm(1-3/8inch), 45mm(1-3/4inch), 51mm(2inch), 54mm(2-1/8inch), Cutting Length: 25mm(1Inch), Dia.: 10mm(2/5 Inch) , perfect for drilling Hard Metal; [Unique Three-blade Design] This hole Saw teeth designed with Three-blade, Include outer blade, middle blade, and inner blade, making it and more efficient, perfect for cutting hard metals; [Multipurpose Tools]This Hole saw set apply to Bench drill, magnetic drill, 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] Carbide Steel teeth for fast cutting of clean, round holes. Suitable for hand electric drill, stand motor- drilling machine and mobile ribbon type magnetism drilling machine Features: 1) and high quality Tungsten Carbide Tipped Hole Saw Set; 2)High precision, cutting, especially impact resistance, wear resistance. Sharp gears and anti-cutting with lower consumption make the product a long service life; Specification: Suitable for: stainless steel, steel plate,iron, aluminum, and various types of pipes; Material: metal Color: Silver Cutting diameter:16mm (5/8inch),19mm(3/4inch), 22mm(7/8inch), 25.5mm(1inch),29mm(1-1/8inch), 32mm(1-1/4inch), 35mm(1-3/8inch), 45mm(1-3/4inch), 51mm(2inch), 54mm(2-1/8inch); Cutting Length: 1Inch; Dia.: 2/5 Inch(10mm) Warm Tips: Do not forgetto use a lubricant so that the bit does not overheat. It can be water or some kind of oil. Package Contents: 12PCS TCTHole Saw Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.