To provide you with a better engraving experience, this roller is made of T slot 2020 aluminum extrusion, sturdy 4.5mm thick plexiglass (blue transparent), and a Nema 17 stepper motor with good torque and low self-interference. Meanwhile, it is adjustable to 5 roller positions at 15 mm intervals, from 20 mm diameter up to 200 mm length. Roller spacing is adjustable from 20 to 90 mm. compatible with cylindrical objects with a minimum diameter of 20 mm and a maximum diameter of 200 mm. What’s more, this is ideal for all-angle engraving on glasses, coated drinking cups, cans, wood, and other cylindrical objects. Connecting the Y-axis motor cable of the laser engraver to the motor of the rotary roller will be accessible. Rotary rollers are compatible with Lightburn and LaserGRBL.