diff --git a/OSCADSharp/OSCADSharp/Internal/Scripting/Solids/SphereScriptBuilder.cs b/OSCADSharp/OSCADSharp/Internal/Scripting/Solids/SphereScriptBuilder.cs
index 2c779a1..89dbe6c 100644
--- a/OSCADSharp/OSCADSharp/Internal/Scripting/Solids/SphereScriptBuilder.cs
+++ b/OSCADSharp/OSCADSharp/Internal/Scripting/Solids/SphereScriptBuilder.cs
@@ -8,8 +8,8 @@ namespace OSCADSharp
 {
     internal class SphereScriptBuilder
     {
-        private IBindings bindings;
-        private Sphere sphere;
+        private readonly IBindings bindings;
+        private readonly Sphere sphere;
 
         internal SphereScriptBuilder(IBindings bindings, Sphere sphere)
         {
diff --git a/OSCADSharp/OSCADSharp/Public/Inches.cs b/OSCADSharp/OSCADSharp/Public/Inches.cs
index 2dd87f8..6414869 100644
--- a/OSCADSharp/OSCADSharp/Public/Inches.cs
+++ b/OSCADSharp/OSCADSharp/Public/Inches.cs
@@ -14,27 +14,27 @@ namespace OSCADSharp
         /// <summary>
         /// One imperial inch
         /// </summary>
-        public const double One = 25.4;
+        public static double One { get; private set; } = 25.4;
 
         /// <summary>
         /// Half of an imperial inch
         /// </summary>
-        public const double Half = One / 2;
+        public static double Half { get; private set; } = One / 2;
 
         /// <summary>
         /// Quarter of an imperial inch
         /// </summary>
-        public const double Quarter = Half / 2;
+        public static double Quarter { get; private set; } = Half / 2;
 
         /// <summary>
         /// Eigth of an imperial inch
         /// </summary>
-        public const double Eigth = Quarter / 2;
+        public static double Eigth { get; private set; } = Quarter / 2;
 
         /// <summary>
         /// Sixteenth of an imperial inch
         /// </summary>
-        public const double Sixteenth = Eigth / 2;
+        public static double Sixteenth { get; private set; } = Eigth / 2;
 
         /// <summary>
         /// Converts inches to millimeters