Specification Brand : HARFINGTON BulletPoint1 : Size - Cutting diameter: 20.5mm / 0.81" (13/16"); cutting depth: 14mm / 0.55"; triangular shank size: 8mm / 0.31"; total length: 71mm / 2.8" BulletPoint2 : Material - M35 HSS (high-speed steel) contains 5% cobalt, offering high hardness, high strength, heat resistance, durability, wear resistance and impact resistance. It is more durable than ordinary high-speed steel, and can maintain hardness and cutting ability even after long-term use. BulletPoint3 : Feature - The fully ground teeth make precise cuts, creates a smoother cut and reduces the amount of burring or chipping. It is are more durable, and can be sharpened more easily. Titanium plating provides durability, corrosion resistance, wear resistance, and lower coefficient of friction. BulletPoint4 : Applications - The hole saw cutter is suitable for cutting stainless steel, aluminum alloy, copper, brass, metal, wood and plastic. Widely use in pipes, tubes, plates, furniture making, door knobs, cabinet pulls and DIY projects , great for woodworking, metalworking, plumbing. BulletPoint5 : Note - NOT recommended for ceramic tile, concrete, stone, and not for metal over 5mm thick. Used with hand-held drills, drill presses, and rotary tools. Use a lubricant or cutting oil, apply correct speed and even pressure, clear the chips from the hole frequently. Comes with a plastic case for protection and storage. Color : Multi CompatibleMaterial : Carbide ExternallyAssignedProductIdentifier1 : 008925127925 ExternallyAssignedProductIdentifier2 : 0008925127925 ExternallyAssignedProductIdentifier3 : 00008925127925 FinishType : Titanium GpsrSafetyAttestation : 1 IncludedComponents : DRILL_BITS IncludedComponents1 : 2-1/16" Hole Saw IncludedComponents2 : 2-1/16" Hole Saw IncludedComponents3 : 2-1/16" Hole Saw IncludedComponents4 : 2-1/16" Hole Saw IncludedComponents5 : 2-1/16" Hole Saw ItemDisplayDimensions_Length : 1 inches ItemName : HARFINGTON 2pcs Hole Saws 20.5mm (13/16") M35 HSS (High Speed Steel) Titanium Coated Drill Bits Cutters Openers for Stainless Steel Aluminum Alloy Metal Wood Plastic ItemPackageDimensions_Height : 11.6 centimeters ItemPackageDimensions_Length : 2.8 centimeters ItemPackageDimensions_Width : 8.3 centimeters ItemPackageQuantity : 2 ItemShape : Rectangular ItemTypeKeyword : hole-saws Manufacturer : HARFINGTON Material : High Speed Steel ModelName : DHS2063 ModelNumber : DHS2063 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 2 NumberOfTeeth : 4 PackageLevel : unit PartNumber : hta230513hh0055 Pattern : Solid PowerSourceType : Manual ProductDescription : M35 HSS (high-speed steel) contains 5% cobalt, offering high hardness, high strength, heat resistance, durability, wear resistance and impact resistance. It is more durable than ordinary high-speed steel, and can maintain hardness and cutting ability even after long-term use. The fully ground teeth make precise cuts, creates a smoother cut and reduces the amount of burring or chipping. It is are more durable, and can be sharpened more easily. Titanium plating provides durability, corrosion resistance, wear resistance, and lower coefficient of friction. The black oxide coating increases corrosion resistance, wear resistance and lubrication. The hole saw cutter is suitable for cutting stainless steel, aluminum alloy, copper, brass, metal, wood and plastic. Widely use in pipes, tubes, plates, furniture making, door knobs, cabinet pulls and DIY projects , great for woodworking, metalworking, plumbing. The hole drill bit can be used with hand-held drills, drill presses, and rotary tools. A drill press provides precise control over the drilling process, making it an excellent choice for drilling multiple holes or drilling through thick materials. Keep the hole saw steady while drilling. Notice: NOT recommended for ceramic tile, concrete, stone, and not for metal over 5mm thick. Use a lubricant or cutting oil on the cutting edge to reduce friction and prevent overheating, resulting in longer tool life and smoother cuts. Apply correct speed, even pressure, and clear the chips from the hole frequently to avoid clogging. Pay attention to the cutting process and adjust the speed as needed.