Precision Electronic Edge Finder with LED & Beep for CNC Lathe Milling Machine Features: 1. No need to rotate for measurement. 2. Suitable for traditional milling machines and integrated processing machines. 3. Quickly locate workpiece edges. 4. Precision stainless steel probe, solid and durable. 5. Can measure X and Y axis coordinates of the workpiece. 6. When the probe touches the workpiece, there will be a red light and a beep.   Specification: Material: Staibless steel Battery: 2 x  12V 23A batteries (NOT included) Shank diameter: 20mm/0.79in Probe diameter: 10mm/0.39in Total length: 160mm/6.30in   Package weight: Approx. 290g/10.2oz   Package list: 1 x Electronic Edge Finder 1 x Storage Case   Note: 1. To ensure measurement accuracy, please do not touch the probe directly with your hand. 2. If it is not used for a long time, please remove the battery to extend the battery life. 3. If the battery power is found to be insufficient, please replace the battery of the same model immediately.