Material: metal . It is suitable for machining wood, acrylic, porcelain, plastic, aluminum, iron, steel and other materials Wiring : The white line receives the control card to the blades, and the black line receives the control card G terminal Color: red + black Type: Engraving Machine Tool Setting Block Diameter: (Approx.) 40mm Height: (Approx.) 20mm Usage: According to the wiring is properly connected and control panel for the cutter, clip and connected to the ground of the control panel ( clip can be caught in the spindle, but must the spindle and ground wire is connected to main board), when the cutter device of cutting tool, the cutting process is complete. Notes: When you are connected to the cutter block, the device (but do not the spindle motor). 't be too to clip the clip on the spindle, first try to touches the face of the cutter with the clip, observe whether the Z axises has a reaction to the cutter, confirm there is no problem, then implement the automatic cutter. Included: 1 x Engraving Machine Tool Setting Block Auto Instrument Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.