... surface 3.electric lift platform for different height Wood Wood Crafts Engraver System (with Rotary Clamp)Feature:1.32 DSP numeral control card ... laser focusing on precision.2. Adopt electric lift platform, Rotary clamp, widen the appliance, especially for spherical, columnar, conical shape material ... out of the use or inability to use these products. Wood Crafts Engraver System (with Rotary Clamp)