High quality material: 5 percent Cobalt in M35 HSS provides extended life compared to regular drill bits. Durable and sturdy for longer life. Heat Resistance: Our HSS twist drill bits should be run and operated at 1500 RPM or higher for maximum efficiency. Straight shank provides firm hold and precise centering, fits standard drill chucks and regular round chucks. Twisted design and performance: 135 precision split point, gold oxide finish and shank round right. Prevents walking, cleans chips and particles faster. Produced with precision fully ground, which ensures that the shavings move easily. Professional and widely used: M35 Cobalt HSS is more suitable for hardened materials. Particularly effective in cutting hard metals such as steel, stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and wood, and can also be used for more materials Easy to use and store: 13 piece M35 cobalt steel drill bit set including sizes: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm. 13 pieces packed in a plastic box for easy use and storage.Features:High speed steel surface, titanium coated.HSS with 5 percent cobalt provides hardness for wear resistance, piercing ability.Split points at 135 degrees are self-centering for reduced thrust and easier penetration.Apply to drill steel, stainless steel, cast iron, copper, aluminum, plastic and wood .Ideal for DIY, home and general construction/engineering.M35 HSS cobalt drill bitsSpecification:135 split point tip and twist design: Increase cutting speed with self-centering and prevent walking, remove chips and particles fasterHardware: HSS M35 Cobalt 5 percent Corner point: 135 degreesFlute type: SpiralStem type: Straight ShankSize includes: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mmLength: 6cm - 11.7cm / 2.36" - 4.61"Weight: 125gPackage dimensions: 13.3 x 7.5 x 1.2cm13 Pieces HSS M35 Cobalt Steel Twist Drill Bit Set 1.5mm-6.5mmProfessional and widely used:Our M35 Cobalt HSS twist drill bit is more suitable for drilling hardened materials, such as steel, stainless steel, copper, cast iron, alloys high temperature, titanium alloys, hard plastics and woods, and can also be used for softer materials, such as wood, plastic and aluminum etc.Widely Application:Handheld DevicesSuitable for lithium drill, hand drill, impact drill, etc.Drilling equipment flatSuitable for bench drill, magnetic drill, column drill, milling machine, machining center, etc.