Background: The present study was conducted to assess the shaping ability of four NiTi systems, two rotary, and two reciprocating. Materials & Methods: 40 resin blocks with simulated canals of 30° curvature were divided into 4 groups. In group I, the canals were prepared using One Shape rotary file system, in group II with F360 rotary file system, in group III with Wave One primary rotary file system and in group IV with Reciproc size 25 NiTi systems. The inner and outer walls of canal curvature were assessed. Results: There was significant difference in amount of dentin removed from inner and outer dentin wall in all groups (P< 0.05). The mean preparation time in group I was 60.2 seconds, in group II was 59.4 seconds, in group III was 90.8 seconds and in group IV was 104.6 seconds. The difference was significant (P< 0.05). Conclusion: Rotary single‑file systems prepared canals with less preparation time as compared to other file system. Key words: Rotary single‑file, Reciproc size, Simulated canals