Material: Metal Suitable for machining wood, acrylic, porcelain, plastic, aluminum, iron, and steel Wiring method: White wire connects to the control card signal terminal; black wire connects to the control card GND terminal Color: Red + Black Type: CNC Engraving Machine Tool Setting Block Diameter: 40 mm Height: 20 mm Usage: Connect the tool setting block according to the wiring method. Attach the alligator clip to the spindle (ensure the spindle is properly grounded to the main board) and connect it to the control panel ground terminal. When the cutting tool contacts the tool setting block, the Z-axis will detect the touch and stop automatically. Notes: Before starting the automatic tool setting process, power on the machine (do not start the spindle motor). Gently place the alligator clip onto the spindle—avoid touching the cutting edge directly. Observe whether the Z-axis responds correctly. Once confirmed, proceed with the automatic tool setting. Package includes: 2 x CNC Engraving Machine Tool Setting Blocks Note: Color may vary slightly due to monitor settings and lighting conditions. Measurement tolerance: ±1–3 mm.