Specification Brand : HARFINGTON BulletPoint1 : Size - Cutting diameter: 19mm / 3/4", 22mm / 7/8", 25mm / 1", 32mm / 1-1/4", 38mm / 1-1/2", 44mm / 1-3/4", 54mm / 2-1/8", 64mm / 2-1/2"; cutting depth: 28mm / 1-1/8". Hex / Round Shank Mandrels: drill diameter: 6mm / 1/4" / 5mm / 3/16", shank Size: 10mm / 3/8" / 6mm / 1/4" BulletPoint2 : Material - Made of high-speed steel (hss), the hole saw kit offers excellent hardness, toughness, wear resistance, and heat resistance. The sprayed coating resists rust and corrosion. BulletPoint3 : Features - Sharp toothed edges allow for smooth, fast and easy cuts. The hole saws have more cutting edges than carbide hole saws, ensuring faster cutting. Side chip holes facilitate chip removal and prevent clogging, and allow lubricant to reach the cutting area, extending tool life and cutting efficiency. BulletPoint4 : Applications - The Professional Grade hole saw set creates round holes in wood, plywood, plastic, plasterboard, 0.5mm thick aluminum sheet metal, density board (MDF), particle board. Great for various applications such as door locks, hinges, cabinets, pipes. BulletPoint5 : Note - Used with bench drills, drill presses, electric hand drill, cordless drill, etc..The cutting material must be fixed well, and at a 90 degree angle to the hole opener. Do not use on impact drills. Apply an appropriate lubricant, use proper speed and pressure and always wear appropriate safety gear. Color : Silver Tone CompatibleMaterial1 : Glass CompatibleMaterial2 : Porcelain CompatibleMaterial3 : Ceramic CompatibleMaterial4 : Marble CompatibleMaterial5 : Porcelain CustomerPackageType : Standard Packaging CuttingAngleString : 90.0 degrees ExternallyAssignedProductIdentifier1 : 0717015897692 ExternallyAssignedProductIdentifier2 : 717015897692 ExternallyAssignedProductIdentifier3 : 0091044252722 ExternallyAssignedProductIdentifier4 : 00091044252722 IncludedComponents : 2Pcs Diamond Hole Saw Drill Bit ItemDisplayWeight : 1.4 pounds ItemName : HARFINGTON 8pcs Hole Saw Set 3/4" - 2-1/2" (19mm-64mm) HSS (High Speed Steel) Professional Hole Saw Drill Bit Kit with Mandrels Hex Key Installation Plate for Metal Wood Plastic Plasterboard ItemPackageDimensions_Height : 1.97 inches ItemPackageDimensions_Length : 8.27 inches ItemPackageDimensions_Width : 4.72 inches ItemPackageQuantity : 1 ItemTypeKeyword : hole-saw-sets Manufacturer : HARFINGTON Material : Carbon Steel ModelName : CZHS13P ModelNumber : Diamond Hole Saws 38mm NumberOfItems : 12 PartNumber : hta230626hh000526 ProductDescription : Made of high-speed steel (hss), the hole saw kit offers excellent hardness, toughness, wear resistance, and heat resistance. The sprayed coating resists rust and corrosion. Sharp toothed edges allow for smooth, fast and easy cuts. The hole saws have more cutting edges than carbide hole saws, ensuring faster cutting. Side chip holes facilitate chip removal and prevent clogging, and allow coolant or lubricant to reach the cutting area, extending tool life and cutting efficiency. The Professional Grade hole saw set creates round holes in wood, plywood, plastic, plasterboard, 0.5mm thick aluminum sheet metal, density board (MDF), particle board. Great for various applications such as door locks, hinges, cabinets, pipes. Used with bench drills, drill presses, electric hand drill, cordless drill, etc.. The power of hand electric drill needs to be greater than 750W. The cutting material must be fixed well, and it must be at a 90 degree angle with the hole opener. Do not use on impact drills. Before drilling, clamp or secure the workpiece firmly, and mark the center point of the hole. For larger diameter hole saws, it is recommended to start with a guide hole. Apply an appropriate lubricant according to the material being drilled (for example, oil for metal, water for wood). Use proper speed and pressure and always wear appropriate safety gear.