Stone Carving With A Portable Workbench

I would recommend that you would need to ensure that the workbench height is adjustable to allow you to be in a comfortable position throughout your carving process.

Having it adjustable means that you can set it to allow for minimal bending of your back - keeping your back safe.

The next safety feature is the workbench clamps. Again this is important for carving stone. The bench needs to have a device which will lock the stone into place - thus freeing your hands and minimising cutting yourself.
Being a mobile workbench has a huge advantage over a fixed bench as you can move around and work on your sculpture from all angles. It also lets you sculpt wherever you feel inspired like being outside carving stone on a warm Sunday afternoon. Also be aware that there are many cheaper versions but these tend to be very flimsy and may not last.

I recommend using this type of portable bench: When using this bench, the top surface opens and closes by winding the handles in the same direction at the same time. It is a good idea to get used how the bench works before you start working on your first sculpture.