Features: 100% brand new and high quality It is suitable for machining wood, acrylic, porcelain, plastic, aluminum, iron, steel and other materials This Mach3 feeler block is used for CNC milling engraving machine Mach3 feeler block, as automatic Setting Gauge,makes CNC milling engraving process smooth Easy to install and use Specification: Type: CNC Engraving Machine Tool Setting Block Color:as the picture Weight: Approx.69g/2.4oz Wiring method: The white line receives the control card to the blades, and the black line receives the control card G terminal According to the wiring method is properly connected and control panel for the cutter, crocodile clip and connected to the ground of the control panel (crocodile clip can be caught in the spindle, but must ensure that the spindle and ground wire is connected to main board), when the cutter device of cutting tool, the cutting process is complete. Package list: 1 x CNC Engraving Machine Tool Setting Block