The h file is round in cross section. H file has strong cutting force and high efficiency, but it is easy to damage the root canal wall.
There are Stainless steel and nickel titanium two material can be chosen.
The difference between stainless steel and nickel-titanium files:
The size of H file is similar as K file, the minimum size of stainless steel H file is #06.The NITI files of #6 is too thin and soft, it is easy to break, and the efficiency is not high, So we didn’t produce.
Our hand use NITI files handles have the word “NITi” printed on them.