Material: Metal Suitable for machining wood, acrylic, porcelain, plastic, aluminum, iron, and steel Wiring method: White wire connects to the control card output to the probe; 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 probe according to the wiring method. Attach the alligator clip to the machine spindle or ground point, ensuring the spindle is properly grounded to the control board. When the probe contacts the cutting tool, the Z-axis will detect the position automatically. Notes: Before starting the spindle motor, power on the system and gently touch the probe tip to the cutting tool with the alligator clip. Verify that the Z-axis responds correctly. Once confirmed, proceed with automatic tool setting. Includes: 2 x CNC Engraving Machine Tool Setting Block Note: Color may vary slightly due to monitor settings. Measurement tolerance: ±1–3 mm.