HyFlex Controlled Memory NiTi Files have been manufactured utilizing a unique process that controls the material’s memory. The files are extremely flexible and have controlled memory. This gives the file the ability to follow the anatomy of the canal very closely, reducing the risk of ledging, transportation or perforation. The files can be pre-bent, to allow for easy insertion into canals with limited opening. The files respond to excessive resistance with straightening of the spirals, which avoids binding to the walls and therefore increases fracture resistance. This form adaptation can be reversed quickly by heat treatment (during autoclaving or with a glass bead sterilizer) returning the instruments back to their original shape. Furthermore the heat treatment will strengthen the files making them a lot more resistant to cyclical fatigue. The heat treatment also provides a clear visual opportunity to verify safe continuation of file use. Size 20, taper 4%, length 25mm. Speed range: 500 rpm, max torque 2.5 N.cm.