Micro Drill Bits, 1.55mm Drill Diameter 50mm Total Length, 6542 High Speed Steel Fully Ground Twist Drill Bit - (Applications: for Copper Metal Wood), 10-Pieces
★ Wide Applications --- Suitable for processing non-ferrous metals, such as copper and aluminum, and also soft materials. When it cannot penetrate, try to adjust the RPM. Suitable for electric hand drill, bench drill and machine tool equipment.
★ Fully Ground --- The fully ground flute design, provides longer drilling life and better drilling performance, and reduces friction and heat.
★ High Speed Steel --- Made of high-speed steel, with high hardness, heat resistance, wear resistance, and durability. HSS(High Speed Steel) enables the drill body harder and can keep a longer drilling life and fast drilling performance.
★ Useful Tips --- Please keep cool use by using it with water, which can keep a longer drilling life of the drill bit.