Feature:1. Wide application, suitable for steel plate, iron plate, stainless steel and all kinds of thick materials.2. The maximum drilling, the depth is less than 5mm.3. Carbide teeth for quick cutting of round and clean holes.4. Suitable for manual electric drill, support motor drilling machine and mobile tape type magnetism drilling machine.5. Through a special heat treatment, incisive edge, high strength.Specification:Condition: 100% Brand NewItem Type: Hole Saw SetMaterial: High Speed Steel Color: As shown in the pictureDiameter: Approx.16mm / 0.6in, 18.5mm / 0.7in, 20mm / 0.8in, 25mm / 1.0in, 30mm / 1.2inWeight: Approx.336g/11.9ozPackage List:5 x Drill Bit Saw5 x Hex Wrench 5 x SpringNote:1. Because there was a manual measuring ,the size may has 1-2inch difference.2. The color may be slight different due to the condition or light or different monitor.