- Sizes -- The sizes of this screws set: M 4.2*13, M 4.2*16, M 4.2*19, M 4.2*25, M 4.2*32, M 4.2*38, M 4.2*50
- Pointed Drilling Tails -- These self-drilling screws has pointed drilling tails, no need of auxiliary processing.
- Easy to Operate -- They can directly drill, tap and lock on material at the same time, safe and easy to operate, greatly saving construction time.
- High Maintenance Force -- Compared with ordinary screws, they have high maintenance force, and will not be easily loose for long time.
- For Color Steel Tile -- Mainly used for fixation of color steel tile in steel structure, or for simple construction of thin sheet.