LaserPecker Rotary Extension Accessory used a couple of times as a test, looks like new.
Specs:
For rounded, spherical, ring-shaped or irregular surfaces
The Rotary Extension Accessory comes with three sets of adjustable jaw attachments that can be used to fix engraving objects with a diameter of 1mm to 145mm. Whether conical, spherical, cylindrical or ring-shaped inner or outer walls.
Dimensions: 308 x 99 x 108mm (12.12" x 3.89" x 13.19")
Compatibility: LP2 Plus, LP4, LP5, LP5 Safeguard, LX2