1. High-speed steel straight shank drill bits are suitable for most general applications and have a combination of hardness and hardness. Toughness and wear resistance.
2. The ability of the lower shank drill bit to expand the size of the portable drill chuck during the tool change. Ordinary flute and minimum adjustment of total length.
3. The high-quality gold-titanium and nitride black double coating can lubricate the lubricant better than the conventional black surface, making drilling smoother, more durable, and more corrosion-resistant.
4. Suitable for all kinds of stainless steel, aluminum alloy, iron, copper, brass and metal materials. It is an perfect tool for maintenance departments, mechanical workshops and other industries.

Blade diameter: 4 mm / 0.16 inch
Tool handle diameter: 4 mm/0.16 inch
Effective blade length: 43mm / 1.73 inches
Total length: 75 mm / 2.95 inches
Surface treatment: black and gold oxide surface treatment
Handle type: round handle
Type: Hot rolled
size:4mm
Material:High speed steel 4341
colour:Black+gold

Package Contents:
10 x straight shank twist drill

Only the above package content, other products are not included.
Note: different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.