Connects to Your Handpiece! The Rider Apex Locator is light and compact, weighing less than an ounce, and it attaches to your endodontic handpiece. Its Digital Signal Processor accurately measures file depth in wet, dry, or bleeding canals. Includes fully autoclavable accessories, automatic calibration, automatic shut-off, easily replaceable battery, and a 36-month warranty. 0.1 mm measuring tolerance Six LEDs and measuring frequencies display accurate readings of the file position in real time Audible alarm sounds when the file reaches the 0.5 mm mark Flexible rotation guarantees easy viewing during procedures