- Product Size: #30 Length: 31mm. - K-files have a rhombic cross-section, weak rotary cutting, tight thread spacing, and large cross-sectional area. - They are mainly used to remove the dentine of the root canal wall and dredge the root canal. - Extremely strong, flexible and durable for searching root canal, cleaning and shaping the canal walls. - Designed to clean out the dentin and make root canals smooth. - To give operators a smooth tactile sense inside the root canal. **For further product information, please contact Chat Support**