Control - The reciprocating technology means that it will only shape the canal when pressure is applied, giving you the feeling of complete control. Simplicity - X-one also simplifies the procedure, in most cases requiring just one NiTi instrument per root canal treatment. Strength- The M-Wire Nickel-Titanium technology provides overall flexibility and resistance to cyclic fatigue, the leading cause of file separation.iIn fact, the tougher the instrumenting challenge,like shaping severely curved to the apex, the more apparent the M-Wire NITI's advantages become. Packing:small file 1pcs,Primary file 1pcs,Large file 1pcs.