Specifications:
Cutting Edge Diameter: 12mm / 0.47", 12.5mm / 0.49"
Shank Diameter: 12mm / 0.47", 12.5mm / 0.49"
Cutting Edge Length: 102mm / 4.02"
Total Length: 150mm / 6"
Material: High Speed Steel 4341
Finish: Titanium and Nitride Coated
Shank Type: Round Shank
Type: Hot Rolling
Package Content: 1pcs x 12mm Drill Bits, 1pcs x 12.5mm Drill Bits

Descriptions:High-speed steel straight shank drill bits feature high hardness, good toughness, high wear resistance, suitable for most general purpose applications. Universal round shank for easier clamping and stable cutting process.
Sharp spiral flutes provide neat and smooth cuts. High cutting edge strength, fast cutting speed. Spiral groove facilitates the export of metal chip, saving time and effort in operation. Common flute and overall length for minimal adjustment during tool changes.
Gold titanium and black nitride dual coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant than the regular black surface.
Suitable lubricant is conducive to cutting or cooling, making cutting easier and improving smoothness and dimensional accuracy. It can help to extend the service life of tools.
Widely used for drilling stainless steel, aluminum alloy, iron, copper, wood and plastic. Good tool for maintenance departments, machine shops, and other industries. Used on electric hand drill, drilling machine and bench drill.
When using hand-held electric drill, the recommended speed is 100-1000rpm/min; the larger the drilling diameter, the slower the drilling speed. Drill metal with high hardness or foreign substance, the rotational speed should be slower than normal drilling.