Compatibility: This z-axis lift device is suitable for TT-5.5S, TTS-25, TTS-55, TTS-10 laser-engraver without modifying the device. Will not fit engraver without adapters or mod.<br> 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.<br> 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.<br> Adjustment Stroke: The maximum lifting stroke is 55mm, which enables the laser-to engrave thicker items, such as skateboards, wood etc. , 0.32 pounds (146g), does not affect the speed and accuracy of the XY axis of the engraver.<br> 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.<br> Colour: Black<br> material: metal<br> Package Contents:<br> 1pcs engraving<br> Only the above package content, other products are not included.<br> 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.