SIRONiTi APEX and SIRONiTi Air? APEX. Safety as valuable as gold. You do not want to use any additional table top device when preparing root canals? With the contra-angle handpieces SIRONiTi APEX and SIRONiTi Air+ APEX for connection to an apex locator you?ll always have just the right equipment. Both handpieces are equipped with a torque limitation function: Once the set torque has been reached, the gold-plated magnetic coupling prevents jamming of the file in the root canal by retro-rotation. SIRONiTi APEX and SIRONiTi Air+ APEX – perfect for endodontics. For all standard NiTi file systems with Ø 2.35 mm No jamming of the files in the root canals Torque levels can be easily set For electric or air motors