Flex 4 Files are Controlled Memory (CM) NiTi rotary instruments, engineered through an exclusive thermal treatment process. Unlike conventional NiTi systems, all metallurgical transitions between austenite and martensite phases occur at room temperature, offering superior flexibility, fatigue resistance, and clinical safety.

Packaging:
All variants are available as pack of 4 files.
Assorted (21mm/25mm): Opener Sx (19/04), Glide Path File (16/02), Finishing Files (20/04, 25/06)
Individual Sizes (21mm/25mm):
- 20/04 
- 20/06
- 25/06
Glide 4 Files (21mm/25mm): 16/02
 
Key Features:
Controlled Memory Wire (CM Alloy):
Adapts to canal curvature with minimal restoring force — preserving natural anatomy and reducing the risk of ledging, transportation, or perforation.
 
Exceptional Flexibility & Pre-Curving Ability:
Can be pre-bent like stainless steel files and maintain shape inside highly curved canals, offering unmatched navigation capabilities.
 
High Resistance to Torsional & Flexural Fatigue:
Special heat-treated alloy significantly prolongs instrument lifespan compared to conventional NiTi files.
 
Shape Memory Recovery:
After sterilization, instruments return to their original shape — restoring their metallurgical integrity and mechanical performance.
 
Optimized Triangular Convex Modified Cross-Section:
Ensures efficient debris removal, reduces friction against canal walls, and delivers aggressive yet controlled cutting efficiency.

RPM and Torque: 
Opener Sx - 300 RPM, 2.5 NCm
Glide Path File (16/02) - 300 RPM, 1.5 NCm
Finishing Files (20/04, 25/06) - 300 RPM, 2.5 NCm