The OMTech 80mm Jewelry Marking Tool with a 360 Rotary Axis is a versatile tool designed for fiber laser marker engravers. It features a NEMA 23 2-Phase Stepper Motor and a range of drivers including MD542A and MD545A. With a chuck length of 1.6 inches and a maximum chuck expansion of 0.4 inches, this tool can hold items securely for engraving. The tool can engrave in a 360-degree rotation, making it suitable for a variety of applications. Made of aluminum, brass, and stainless steel, this tool is durable and efficient for professional engraving tasks.