diff --git a/Engine.Physics2D/Collider2DCircleBehaviour.cs b/Engine.Physics2D/Collider2DCircleBehaviour.cs
index a11be89..d652636 100644
--- a/Engine.Physics2D/Collider2DCircleBehaviour.cs
+++ b/Engine.Physics2D/Collider2DCircleBehaviour.cs
@@ -1,4 +1,3 @@
-using Syntriax.Engine.Core;
 using Syntriax.Engine.Physics2D.Abstract;
 using Syntriax.Engine.Physics2D.Primitives;
 
@@ -6,8 +5,8 @@ namespace Syntriax.Engine.Physics2D;
 
 public class Collider2DCircleBehaviour : Collider2DBehaviourBase, ICircleCollider2D
 {
-    public Circle CircleWorld { get; protected set; } = new(Vector2D.Zero, 1f);
-    public Circle CircleLocal { get; set; } = new(Vector2D.Zero, 1f);
+    public Circle CircleWorld { get; protected set; } = Circle.UnitCircle;
+    public Circle CircleLocal { get; set; } = Circle.UnitCircle;
 
 
     public override void CalculateCollider() => CircleWorld = Transform.TransformCircle(CircleLocal);
diff --git a/Engine.Physics2D/Collider2DShapeBehaviour.cs b/Engine.Physics2D/Collider2DShapeBehaviour.cs
index ca2b076..f225ad0 100644
--- a/Engine.Physics2D/Collider2DShapeBehaviour.cs
+++ b/Engine.Physics2D/Collider2DShapeBehaviour.cs
@@ -5,10 +5,9 @@ namespace Syntriax.Engine.Physics2D;
 
 public class Collider2DShapeBehaviour : Collider2DBehaviourBase, IShapeCollider2D
 {
-    public Shape ShapeWorld => _shapeWorld;
-    public Shape ShapeLocal { get; set; } = new([new(1f, 1f), new(-1f, 1f), new(-1f, -1f), new(1f, -1f)]);
+    public Shape ShapeWorld { get; protected set; } = Shape.Box;
+    public Shape ShapeLocal { get; set; } = Shape.Box;
 
-    protected Shape _shapeWorld = new([new(1f, 1f), new(-1f, 1f), new(-1f, -1f), new(1f, -1f)]);
 
     public override void CalculateCollider() => Transform.TransformShape(ShapeLocal, ref _shapeWorld);