Enables the Root ZX II Apex Locator to function as a low-speed handpiece and an apex locator. Root ZX II OTR Handpiece Module snaps easily onto the back of the Root ZX II Apex Locator, and measures and prepares the canal with a unique 90° autotorque release-and-file advancement feature. Module maintains excellent cutting efficiency with less stress on the file, reducing the possibility of breakage. It offers 3 speed settings of 100, 300, and 500 rpm and 3 programmable memory modes. In normal mode, 8 speed settingsfrom 150800 rpmand 11 torque settings are available. 1-year warranty.