2:Size : M10~M24
3:Material : carbon steel
4: Surface treatment: HDG
4: Grade: Class 5
5:Feature:locking against remove.long reinforcement &long life.
Noted: other size can be customed.


1: can't remove after installation
2: low cost high quality against looesing.
3: anti-corrsion and long life
More details information or loosening problems.just contact me by email,our professional team is always here with you !