Specification: cutting edge diameter: 2.2 mm/0.087 inches. Cutting edge length: 30 mm/1.18 inches. Shaft diameter: 2.2 mm/0.087 inches. Total length: 60 mm/2.36 inches. Material: YG10X tungsten carbide (HRC92-94). Finish: titanium coating (nanometer coating). Cutting hardness (max. ):HRC55Package Content:1pc x Twist Drill BitDescription:It is made of super fine grain carbide and features high hardness (HRC92-94), abrasion resistance, heat resistance and high bending strength. Thanks to its good milling and cutting performance, carbide can be used at higher speed than high-speed steel. Suitable for processing materials under HRC55, such as stainless steel, alloy steel, tool steel, carbon steel, aluminium alloys, etc. The coating with titanium nanometers provides excellent corrosion resistance, increases wear resistance and hardness and reduces the coefficient of friction. Large and spiral chip spaces for quick and clean chip removal. The sharp cutting edge ensures even cutting without punctures. A suitable lubricant promotes cutting or cooling, which makes cutting easier and improves smoothness and dimensional accuracy. Used on manufacturing centres, drills, CNC lathes, CNC milling and engraving machines. Suitable for various cooling types, such as oil mist, water, oil, air cooling. The length of the tool clamped by the chuck, the better.Tips: With a shorter clamping length, you need to reduce the feed and speed to reduce the vibration and extend the life of the tool. In combination with the material to be machined, choose a suitable feed and cutting speed to increase the tool life and achieve better machining accuracy and performance.