High Quality Material: 5% 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 must operate and operate at 1500 RPM or more for maximum efficiency. Straight shank provides firm grip and precise centering, fits standard drill chucks and regular round chucks. Twist design and performance: 135 precision slotted tip, gold oxide finish and right hand round shank. Prevents walking, cleans chips and particles faster. Precisely produced fully ground, ensuring chips move easily. Professional and widely used: M35 Cobalt HSS is more suitable for hardened materials. Particularly effective for 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 other 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% cobalt provides hardness for wear resistance, drilling ability. The 135 degree split points are self-centering for reduced thrust and easier penetration. Apply to drilling steel, stainless steel, cast iron, copper, aluminum, plastic and wood. Ideal for DIY, home and general construction/engineering. M35 HSS Cobalt Drill Bits Specifications: 135 Split Point Tip and Twist Design: Increases cutting speed with self-centering and prevents walking, removes chips and particles faster Material: HSS M35 Cobalt 5% Angle Point: 135 degree Flute Type: Spiral Shank Type: Straight Shank Size includes: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4, 5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm Length: 6cm - 11.7cm / 2.36 - 4.61 Weight: 125g Package dimensions: 13.3 x 7.5 x 1.2 cm 13pcs M35 HSS Cobalt Steel Twist Drill Bit Set 1.5mm to 6.5mm Professional and Widely Used: Our M35 HSS Cobalt Steel Twist Drill Bit is more suitable for drilling of hardened materials, such as steel, stainless steel, copper, cast iron, high temperature alloys, titanium alloys, hard plastics and wood, and can also be used for softer materials, such as wood, plastic and aluminum, etc. impact drill, etc. Flat drilling equipment Suitable for bench drill, magnetic drill, drill press, milling machine, machining center, etc. Sold by store