Features: High precision, accurate tool setting, and high accuracy of output signal position. The bottom is insulated, waterproof, and oil resistant, with strong durability during use. The crocodile clamp is smooth and flat, clamped on the spindle head, and the clamping force is well read. Qualified materials, stable and durable, with a long service life. Suitable for processing woodworking, acrylic, plastic, aluminum, iron, steel, etc. Specifications: Material: Plastic Size: As shown in pictures Note: Please allow 0-1 cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. Due to differences between monitor displays, the picture may not reflect the actual color of the item. Thank you. Package includes: 1 Set Probe Sensor Tools TTC450 3018 PRO Engraving Machine