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PREMIUM M35 COBALT STEEL – Crafted from High-Speed Steel with 5% Cobalt (HSS-CO), this alloy achieves a Rockwell Hardness of up to 67. It offers superior heat resistance and wear durability, lasting up to 12X longer than standard HSS bits, making it the ultimate choice for heavy-duty drilling.
MASTER OF HARD METALS – Specifically engineered to cut through tough, high-tensile materials. It performs exceptionally well on abrasive metals like stainless steel, cast iron, and titanium alloys, while also slicing effortlessly through softer materials like aluminum, wood, and plastic.
PRECISION 135° SPLIT POINT – Features a self-centering 135° split point geometry that bites into the material immediately. This prevents "walking" or wandering on smooth surfaces, eliminates the need for a center punch, and reduces the pressure required to penetrate.
FULL 19-PIECE METRIC SET – Includes a complete range of metric sizes from 1mm to 10mm in 0.5mm increments (1, 1.5, 2... up to 10mm). The straight shank design features a chamfered end on larger bits for a secure grip in standard drill chucks, preventing slippage under high torque.
DURABLE METAL STORAGE CASE – The bits are housed in a rugged, heavy-duty metal index case. Clearly labeled size markings allow for instant identification and organization, keeping your tools secure during transport and tough working conditions.

Product Description

Drill Bit for Metalworking

Tech Tip 1: You shouldn’t drill deeper than 1/2 of the drill bit’s fluting length to have the best drilling performance.
Tech Tip 2: Don't use M35 cabalt bits on hardened steel, high carbon steel and heat treated steel.
Please wear safe clothing and eye protection for your safety.

M35 Grade Cobalt Steel

Cobalt drill bits aren't made of pure cobalt, but rather a steel alloy with a certain percent of cobalt. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant.

Lowest Cost Per Hole Drilled

Cobalt bits are more expensive than ordinary HSS drill bits. But if you regularly drill metals, they are a good investment since they tend to last longer. With an extended life, you can lower the cost per hole drilled.

19PC Twist Drill Bits in Metric Sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7 mm, 7.5mm, 8 mm, 8.5mm, 9 mm, 9.5mm, 10 mm.

135 degree means less force required to remove metal, compared with lower angles like 90° and 118°.
Self-centering split point allows you to drill directly to the size needed without any pre-drilling.

Drilling metal requires low RPM. Please use a device of which the drilling speed can be adjusted.
Be careful when you use an electric drill. The RPM could be set too high.
The thicker the bit, the slower speed should be.
If you're not sure, please start from the lowest RPM and pressure.

Friction between bit and metal will accumulate an amount of heat.
It's necessary to use cooling liquid during drilling to keep the bit cool. Otherwise, the bit may fry(melt) or only last a short time.
It's both ok to use lubricant oil and to pour water.

It's highly recommended that you use a drill press to drill thick metals. It's stable, powerful and (RPM) adjustable.
If a drill press isn't available, electric drill or charging drill will do the job, too. However, it's more likely you'll meet problems unless you're really experienced.