"I had received a message about our stamp sets, asking why the sets place the rubber and the wooden block separately rather than already attached the handle to the rubber?
Here it is!
When stamping, the edge of the rubber might let the stamp smudging on the paper, at this point, you can trim the stamp to avoid the problem. However, there is also somebody who like to keep their rubber unmounted, then just simply stick the rubber to the wood handle and it would be fine. That’s the reason why we place the rubber and the handle separately, you can decide whether to trim the rubber or not and then simply combine them."
-Lin Chia Ning