When you need to mechanically clamp a cylinder or oddly-shaped item in place while engraving, the 3-Jaw Chuck Rotary Attachment is a great choice. This optional item can hold a variety of cylindrical shaped items.
Start by measuring your cylinder. The diameter will be used in the print driver to set a precise measurement. You can adjust the rotary for the cylinder length by depressing the blue, anodized idle-side handle to move the support mechanism left or right to accommodate different length cylinders.
The 3-Jaw Chuck Rotary features clamps that can hold both items from both the inside and outside diameter of the cylinder by simply flipping the chuck jaws from standard to wide mode (180 degrees) to accommodate larger radius cylinders.