13 Pcs High Speed Steel Cobalt Drill Bit Set

Package quantity: 13 pieces

Diameter: 1.5 - 6.5mm (1/16"-1/4")

1.5mm(1/16"), 2mm(5/64"), 2.5mm(3/32"), 3mm(7/64"), 3.2mm(1/8"), 3.5mm(9/64"), 4mm(5/32"), 4.5mm(11/64"), 4.8mm(3/16"), 5mm(13/64"), 5.5mm(7/32"), 6mm(15/64"), 6.5mm(1/4")

Shank: straight shank

Material: industrial grade High Speed Steel with 5% cobalt alloy M35

Tip point: 135-degree split-point tip

Package: Metal Indexed Storage Case

Very tough professional cobalt drill bit set for precise hole drilling into stainless steel, light-gauge metal, high-carbon steel, aluminum and alloy steel, cast iron, abrasive alloy metal, other hard metal and hardened steel. 4 times life time than normal metal drill bit when drilling into PCB board, plastic, wood, jewelry, sheet metal and normal steel. Fast and precise drilling, heavy duty with long life time. If drilling or cooling oil is applied, it can reach even better drilling result and prolonged life time when drilling into very hard materials. Ideal precise drill bit for professionals in metal working workshops, IT hardware engineers, repairing and maintenance staff, jewelry artists, wood working DIYers, hard metal part processors, metal working craftsmen and other hand work professionals.