The Quantec four-file sequence begins with a .12 taper file, which is followed by tapers of .10, .08 and finally .06. These files are positioned in their sequence such that each instrument strategically removes dentin along only a portion of the file. The larger tapers work toward the orifice, allowing the smaller tapers to more easily work toward the apex. These files are passively carried in succession down the canal, repeating the sequence until the .06 file reaches working length.

The SC files have a safe cutting tip, the LX files have a non-cutting tip.