Features: Only applicable to Laser Master 2 Pro. Laser head lifting device, better use experience of engraving machine. Twist the button to adjust the focal length of the laser head, making it more convenient to adjust the laser head. Made of high-quality metal, with fine workmanship, stable performance and high work efficiency, and is an essential part of linear motion. Any problem, please contact our store without hesitation. Honor to serve you. Specification: For: Laser Master 2 Pro Material: Aluminum Alloy Package Size: 180 x 80 x 80mm or 7.1 x 3.1 x 3.1in Package Weight: 213g or 7.5oz Packing List: 1 x Laser Head Focusing Controller Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.