wtf is this
If you have access to a 3d printer you can get this little helper for nicer stamping. The file and the kit itself is available on nostr:npub1lrjgpa9m2dl6esdah5pq7m005ymwh4glq4aet76q2zlz2f83esfsa2zvrj

Discussion
The plastic thing? Just a tool for better stamping and spacing of the letters. Pretty smart actually