10Pcs 5/32" Cobalt Drill Bits, M35 HSS Metal Jobber Length Twist Drill Bit Set for Hard Metal, Stainless Steel, 4mm

5/32" Cobalt Drill Bits(10Pcs), M35 HSS Metal Jobber Length Twist Drill Bit Set for Hard Metal, Stainless Steel, 4mm

10Pcs 5/32" Cobalt Drill Bits, M35 HSS Metal Jobber Length Twist Drill Bit Set for Hard Metal, Stainless Steel, 4mm

Specification Package: 10Pcs 4mm Twist Drill Bits Material : High Speed Steel M35(HSS-M35) with Cobalt Color: Champagne Shank / Cutting Edge Diameter: 4mm/0.16inch Blade length: 43mm/1.7inch Total length: 75mm/3inch M35 Grade Cobalt Steel 1. Cobalt drill bits are made of pure steel alloy with certain percent cobalt. 2. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant. 3. Cobalt drill bit's hardess is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits. How to Use Twist Drill Bits? 1. Ensure the left and right cutting edges of the drill are symmetrical when drilling. 2. Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit. 3. Mini twist drill bit can NOT be used in the impact drill. 4. Please use with cooling liquid to prolong the working life of the drill bits and to avoid overheating and breakage. 5. Drilling metal is recommended for use on bench drills. 6. Hand drills are suitable for drilling low hardness materials. Kindly Note: Please allow 1-2mm errors due to manual measurement, thank you for your understanding!

Key Features

• ✅ Specification - 10Pcs 4mm cobalt drill bits, each kit contains a total of ten drill bits in the same size, Blade length: 43mm/1.7inch, 118 degree point, straight shank.
• ✅ Material - HSS Cobalt high speed steel for super abrasive resistance in tough metals, improve much higher heat resistance because of cobalt steel's high red hardness.
• ✅ Durable - HSS Cobalt Drill Bit provide strong durable performance compared to typical hss drill bits.
• ✅ Easy to Carry - The cobalt twist drill bits are housed in plastic case for easy storage, easy to carry out homework.
• ✅ Multi-purpose Use - Jobber Length Twist Drill Bit are successful in cutting hard metals such as stainless steel, copper, aluminum alloy, and also can be used for softer materials.

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