5mm Cobalt Drill Bits Set with Storage Case for Stainless Steel, Metal, Plastic, Wood

Package Specification: - Quantity: 10 pieces - Size: 5mm Material: High Speed Steel M35 (HSS-M35) with Cobalt Color: Champagne Shank/Cutting Edge Diameter: 5mm/0.2inch Blade Length: 52mm/2inch Total Length: 86mm/3.4inch

Cobalt drill bits, made of a steel alloy with 5% cobalt known as M35 grade, are designed to be stronger and more heat-resistant than standard steel drill bits. The uniform hardness throughout the material allows for repeated sharpening without damaging the cutting edge, making them more durable than HSS drill bits.

To use twist drill bits effectively: - Ensure symmetrical cutting edges when drilling - Monitor spark uniformity and adjust pressure accordingly - Use cooling liquid to prevent overheating and breakage - Avoid using mini twist drill bits in impact drills - Use bench drills for drilling metal, and hand drills for softer materials

Please note that there may be slight errors in measurement due to manual handling. Each kit includes 10 5mm cobalt drill bits with a blade length of 52mm and a 135 degree point angle, all housed in a convenient plastic case for easy storage and portability.

Constructed from HSS Cobalt high speed steel, these drill bits offer superior resistance to tough metals and improved heat resistance thanks to the cobalt steel's high red hardness. The M35 HSS Drill Bit provides exceptional durability compared to standard HSS drill bits, making it ideal for a variety of applications on both hard metals like stainless steel, copper, and aluminum alloy, as well as softer materials.

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