Features 1、Smart Engraving: Easily lift the laser engraver to perfectly fit the rotation axes for high engraving efficiency. 2、Easy for Adjust: The engraving diameter varies form 30mm to 200mm, the laser rotary roller has 3 adjustable level. 3、Greater Effects: Ensuring smoother working performance, this 360 degree roller enables great engraving effects. 4、Better Matching: Works better with most laser engravers, including for ATOMSTACK, for NE, for Or, for Tws, etc. 5、Simple to Install: Just connect the Y axes terminal to the laser engraver, no assembly required and very simple. Specification Item Type: Laser Rotary Roller Engraving Roller Length: Approx. 195mm / 7.68in 3 Level Width Adjustment: Approx. 0 ~ 30mm / 0 ~ 1.18in Engraving Roller Diameter: Approx. 30 ~ 200mm / 1.18 ~ 7.87in Motor Model: For NEMA17, 42 x 34mm / 1.65 x 1.34in Package List 1 x Laser Rotary Roller 1 x User Manual 5 x Hex Wrench 1 x Power Cable 2 x Screw 2 x Washer 2 x Accessory