1. Compatibility: This z-axis lift device is suitable for TWOTREES TTS-55 PRO/TTS-10 PRO laser engraver without modifying the device. Will not fit other brand engraver without adapters or mod. 2. Focusing is More Convenient: Just turn the knob to adjust the height of the z-axis laser module. It made adjustment of laser so much easier. It can remove all excess play between the laser and the project. 3. Quality Built: This device is well designed and constructed, very solid and the action is smooth, without backlash, very precise, it makes precise laser adjustment very easy. 4. Large Adjustment Stroke: The maximum lifting stroke is 55mm, which enables the laser to engrave thicker items, such as skateboards, wood etc. Lightweighdoes not affect the speed and accuracy of the XY axis of the engraver. 5. More Possible: If you want to update another brand of laser engraver, you can modify the hole position or design the adapter and build the adapter with a 3D printer. Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:Black Material:Metal Package Contents: 1 * Laser Adjustable Lifting Module 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.