Dental Endodontic Apex Locator Root Canal Measuring Instruments 3.7' ScreenDental Endodontic Apex Locator Root Canal Measuring Instruments, 3. 7' Screen, Buzzer Alert, Can Be Sterilized By Autoclaved Sterilizer. Overview Feature Smooth body line with Ergonomics design Low power consumption ,Smooth body Small size,big ability,more accurate multi frequency measurement. The measurement is not affected by the types of teeth The File clip, Lip hook and Touch probe can be sterilized by autoclaved sterilizer. Attention: