Description
1. Made of M35 HSS(High Speed Steel) cobalt steel. With high hardness and red hardness, wear-resistant, and fast drilling performance.
2. The gold oxide surface treatment increases the hardness of the drill bit, provides longer drilling life and better drilling performance, and is more durable and corrosion resistant than uncoated drill bits.
3. Suitable for drilling hard materials and hard metals such as cast iron, hard plastics, but also soft materials. When it doesn't penetrate, try adjusting the RPM.
4. Please keep cool and gentle using, the working life of the twist drill bits can be largely prolonged by proper usage.

Specifications
Material: M35 HSS(High Speed Steel)
Finish: Gold Oxide
Shank Type: Round Shank
Twist Drill Bits Diameter: 7mm / 0.28-inch
Drill Bit Length: 215mm / 8.46-inch
Shank Diameter: 7mm / 0.28-inch
Total Length: 300mm / 11.81-inch

Package Content:
1 Pcs Straight Shank Twist Drill Bit

Notice:
1. Please keep cool and gentle using, the working life of the twist drill bits can be largely prolonged by proper usage.
2. When using a hand-held electric drill, pay attention to speed adjustment. The recommended work speed is 100-1000r/min. The larger the drilling diameter, the slower the drilling speed should be chosen.
3. When the chip evacuation has problem, go back and remove the chips in time.