General description High speed HSS hole saw set designed for efficient cutting through various materials including wood, plastic, and metals. This 5-piece set includes hole saws with diameters of 16mm, 18.5mm, 20mm, 25mm, and 30mm, making it versatile for different applications. Technical specifications Material: HSS6542 Hardness: HRC 65 Surface treatment: titanium coating Hole saw diameters: 16mm, 18.5mm, 20mm, 25mm, 30mm Shank diameter: 8mm Hole saw blade length: 65mm Package weight: 308g Compatibility and accessories Compatible with bench drills, electromagnetic drills, pistol drills, and impact drills Includes an Allen key for removing the pilot bit Individually packed in a plastic box Installation Ensure the hole saw is securely attached to the drill Use the Allen key to remove or replace the pilot bit as needed Usage Use oil or water to reduce temperature when drilling hard materials Wear protective goggles and a mask during operation Use earplugs for prolonged use to minimize