BS Single file for easy job,
Double files for complicate case
For simple root canal treatment, one single 06/25 can handle the whole preparation.
When coming to the complex cases, other system files can be applied. BS has applied new material which breaks the traditional cognition of Singel File system.

It has a strong resistance to fracture not only because of the new material but also the Nano-coating applied. Meanwhile BS mantains the flexibility. It can solve the limited mouth-open problem by using the pre-shape function.
Design of the safe-apex: lower the risk of root canal diviation, ledge formation or side penetration.