Compatibility: This z-axis lift device is suitable for certain brands of laser-engravers without the need for modifications. It will not fit engravers without adapters or adjustments. Focusing is More Convenient: Simply turn the knob to adjust the height of the z-axis laser module. This makes laser adjustments significantly easier and eliminates all excess play between the laser and the project. Quality Built: This device is well designed and constructed, very sturdy with smooth action, free of backlash, and offers a high level of precision, making laser adjustments straightforward. Adjustment Stroke: The maximum lifting stroke is 55mm, enabling the laser to engrave thicker items, such as skateboards and wood, weighing 0.32 pounds (146g), while maintaining the speed and accuracy of the XY axis of the engraver. More Possible: If you wish to upgrade another brand of laser-engraver, you can modify the hole position or design an adapter and create it with a 3D printer. Colour: Black Material: Metal Package Contents: 1 pcs engraving Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real item. The measurement allowed error is +/- 1-3cm.