Hole Saw Box 5PCS HSS Cobalt Hole Saw Ø16 to 30mm, For Wood, Metal, Plastic, Stainless Steel, High Precision

【SUPER MATERIAL】FLINTRONIC HSS high speed steel hole saw made of high speed steel, which has high hardness and wear resistance. They can be perfectly installed on locks, knobs on doors and cabinets or larger diameter holes. It is also suitable for bench drills, electromagnetic drills, pistol drills and impact drills.It is also suitable for stainless steel plates, square tubes, iron, cast iron, wood etc. Specifications: Material: HSS6542. Hardness: HRC 65. Surface treatment: titanium coating. Type: hole saw. Hole saw diameter: 16mm, 18.5mm, 20mm, 25mm, 30mm. Shank diameter: 9mm. Drilling depth: 6mm.Hole saw blade length: 65mm.Package dimensions: 10.5 x 9 x 6.5cm.Package weight: 308g.Application: Widely used in bench drills and electric drill chucks for machine tools, etc.Warning and precautions:1. Use oil or water to lower the temperature before drilling hard materials (such as steel, stainless steel, etc.). Otherwise, the drill bit may be broken at high temperature.2. Wear protective glasses to protect your eyes, please wear a protective mask when working upwards.3.Please wear the earplugs when you need to work for a long time, to reduce the impact of noise.4. Remove the anti-rust oil after use for longer life.5. Please choose a lower speed when continuous cutting.6. Please do not let the edge of the hole saw make violent or strong impact when cutting, so as to avoid the blades breaking.7. Please use coolant when working on hard materials.8. There may be a slight difference in weight and