Size: 06 - 80 Length: 21, 25, 31mm Assorted: 15-40, 45-80, Packed: 6pcs. to a package
Since the helix angle is small, the cutting efficiency is excellent in a reaming action than in a linear filing action. The real shape of the section up to size 40 is square, and size 45 and above is triangular. The cutting chips are thick, and the canal section is formed circular by a reaming action.