diff --git a/README.md b/README.md
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@@ -1,3 +1,7 @@
 # flag-clip
 
-Hybrid clip / carabiner 3D printable model to attach flags to the rope of a flag pole.
\ No newline at end of file
+Hybrid clip / carabiner 3D printable model to attach flags to the rope of a flag pole.
+
+The gate of the carabiner does double duty as the lever of the clip.
+
+Since this was intended for outdoors use, I've printed this in PETG.