diff --git a/src/bow.rs b/src/bow.rs
index d3829e1..6e7f8bd 100644
--- a/src/bow.rs
+++ b/src/bow.rs
@@ -5,6 +5,7 @@ use crate::graph::{
 };
 use crate::primitive::{Bend, Dot, Seg};
 
+#[derive(Debug, Clone, Copy)]
 pub struct Bow {
     seg1_dot1: DotIndex,
     seg1: SegIndex,
diff --git a/src/router.rs b/src/router.rs
index 6d18e03..f07e09c 100644
--- a/src/router.rs
+++ b/src/router.rs
@@ -27,6 +27,7 @@ struct Route {
     width: f64,
 }
 
+#[derive(Debug, Clone, Copy)]
 pub struct Head {
     pub dot: DotIndex,
     pub segbend: Option<Segbend>,
diff --git a/src/segbend.rs b/src/segbend.rs
index feadd48..c4f9082 100644
--- a/src/segbend.rs
+++ b/src/segbend.rs
@@ -5,6 +5,7 @@ use crate::{
     primitive::{Bend, Dot},
 };
 
+#[derive(Debug, Clone, Copy)]
 pub struct Segbend {
     pub seg: SegIndex,
     pub dot: DotIndex,