80mm Rotary 3 Jaw Axis Attachment for Laser Engraver Machine for Irregular-Shaped Objects (For Fiber Machines Only)Features 360 ROTARY MARKING: OMTech's 80mm 3 jaw rotary axis boasts 180 stepless angle adjustment and 360 smooth rotation for engraving around the complete inner or outer circumference of round objects, ideal for rings, bracelets, pens, cups, tubes, and more! ADJUSTABLE JAWS: Our rotary laser marker and engraver attachment has 6 clamping jaws and a chuck key included to securely hold cylinders 0. 08 2. 5 inches (2 63 mm) in external diameter or 1 2. 7