You can read more about this adapter in this post

There are situations when you either don’t need a clamp (when engraving well balanced drinkware without handles) or the clamp can’t be used (when engraving bottles or other objects that need to be placed bottom towards the motor).

This handy adapter lets you use your existing front end stop without the clamp!  Just remove clamp and attach this adapter instead!

Please note: Adapter is NOT compatible with V1 PiBurn Clamp!

Adapter comes with extra front end stop, and all necessary hardware. Thumb screw is not included (please use one that came with your clamp).

If you have a 3D printer, you can just print one yourself for FREE! (you will still need to obtain M4 and M3 Hex Nut)

Here’re links to STL files:

 

Weight 2 oz
Dimensions 6 × 4 × 2 in