- a handy tool when smoothing out the flesh side of your leather
- add the burnishing agent to the flesh, apply pressure back and forth on the leather until it becomes smooth
- also used as a board while tooling/skiving your leather
 
At first, we thought it was just a simple piece of glass. But after looking at samples from different suppliers, the quality of the Craftsha's is the best so far, in terms of the glass texture, edge curvature and smoothness.