uxcell 10 Pcs 0.4mm HSS(High Speed Steel) W6542 Micro Drill Bits, Fully Ground Jobber 20mm Length Drill Bit for Mild Steel Copper Aluminum
- Specification: Flute Treatment:Fully ground, Drill Bit Diameter: 0.4mm / 0.02-inch, Flute Length: 5mm / 0.2-inch, Shank Diameter: 0.4mm / 0.02-inch, Total Length: 20mm / 0.79-inch.
- High Speed steel: Made of high-speed steel, with high hardness, heat resistance, wear resistance, durability and long service life..
- Fully Ground:The fully ground flute design, reduces friction and heat, and increases drilling performance..
- Twisted Design: Split point tip and twist design increases cutting speed while easily self-centering to prevent movement. The twisted design of the drill bit quickly removes drilled chips, then leaving a smooth hole..
- Notice: Please keep it cool and gentle when using it, the correct use can greatly extend the life of the twist drill..