The Hand Master File™ The Hand Master File™ is a modified Hedstrom patented design by Endo Technic. It is the most comfortable hand file you will ever wrap your fingers around. Designed to enlarge canals and flex around ALL CURVES, while maintaining cutting strength, just like our Automated Master Files. Available in SS and NT. The Handle Elongated for better grip and flattened on two sides to prevent calluses. IT FEELS GREAT! The File Body A modified .02 taper HEDSTROM design that will cut on the UPSTROKE ONLY with out separation. Our flutes cut only where you want and not where you don’t. The File Tip Our patented tip is a NON-CUTTING bullet shape. It prevents apical transportation, ledges and perforations."