Hedstrom File:

• Cross-section: Diamond-shaped, resembling a miniature stop sign.
• Flutes: Fine and non-cutting, designed for gentle smoothing rather than aggressive dentin removal.
• Materials: Available in both classic stainless steel and modern NiTi (nickel-titanium) for added flexibility in curved canals.

Hyflex File:

• Cross-section: Unique and variable depending on the file size, designed for optimal cutting performance.
• Taper: Progressive, meaning it gradually narrows towards the tip to facilitate smooth canal navigation.
• Material: Exclusively crafted from NiTi for maximum flexibility and resistance to fracture.