This item is like brand new , it listed as open box due minor cosmetic?. Engrave on Cylindrical Objects:A 4-wheel rotary axis is ideal for engraving cylindrical and irregular-shaped objects with a 60W laser engraver and above. The cylindrical and irregular-shaped objects include cups, bottles, tubes, and pipes. 2 Sets of Drive Wheels:2 sets of drive wheels have a 12-inch maximum distance which is suitable for the 2-14 inches long and 0.4-5 inch in diameter objects. Stable and Reliable Performance:This rotary axis uses a 2-phase step motor to provide precise positioning and repetitive motion while allowing for stable and reliable operation. Efficient Silent Operation:A 4-wheel rotary axis equipped with a precision-designed tailstock allows for smooth, efficient, and non-noise operation which can be applied in DIY, hobby, small business, and industrial use. East to Install:Connect the 4-pin cable in the side cabinet, and configure your software.