19PCS fully ground HSS twist drill bits set

Technical Data

1. Material & Standards: Made of HSS (HSS Co M35 optional), complies with DIN338 and ISO235 standards.
2. Dimensions: 19 sizes from 1mm to 10mm at 0.5mm increments. A 1mm bit is 34mm overall with 12mm working length; a 10mm one is 133mm overall with 87mm working length. Straight shank, 135° split point (118° optional).
3. Other Specs: Surface finishes include bright, black oxide, amber, or titanium coating. Packed in a metal or plastic case.

Advantages

1. Full grinding ensures precise dimensions, smooth hole walls without burrs, and sharp cutting edges for stable drilling.
2. 135° split point realizes self-centering, avoiding deviation without pre-punching and improving efficiency.
3. Multiple coatings reduce friction and corrosion; the 19 sizes cover common demands for diverse drilling tasks.
4. Sturdy case keeps bits organized, easy to store and carry. HSS material ensures good toughness and wear resistance for long service life.