Feature: 1. [Working Principle] The router drill bit will move downwards until the tip contacts the sensor plate, and then the drill bit will return to its original position. Obtain data on surface position. 2. [Accurate Positioning] This Z axes touch plate can greatly improve accuracy and save time, accurately locates the working surface, suitable for PCB engraving. 3. [Easy to Use] With just single click, the machine will automatically return to the designated location, easy to replace and calibrate tools. 4. [Widely Used] Compatible with for Grbl controllers, for Mach 3 controllers, suitable for 3018 Pro, for 3018 Maximum engraving machine routers. 5. [Metal Material] Made from premium metal material, this tool setting touch plate is sturdy and stable in performance, ensuring long lasting durability. Specification: Item Type: CNC Router Tool Setting Touch Probe Material: Metal Package List: 1 x CNC Router Tool Setting Touch Probe 1 x Crocodile Clip Cable