diff --git a/modules/workbenches/modeler/features/fillet_tool/index.ts b/modules/workbenches/modeler/features/fillet_tool/index.ts
index cc9fc1e5..6f35369f 100644
--- a/modules/workbenches/modeler/features/fillet_tool/index.ts
+++ b/modules/workbenches/modeler/features/fillet_tool/index.ts
@@ -25,6 +25,17 @@ export default {
     mutualExclusiveFields: [],
     paramsInfo: ({ size, opperationType, }) => `(${r(size)} ${r(opperationType)}})`,
     form: [
+        {
+            type: 'selection',
+            name: 'edges',
+            capture: [EntityKind.EDGE],
+            label: 'edges',
+            multi: true,
+            defaultValue: {
+                usePreselection: true,
+                preselectionIndex: 0
+            },
+        },
         {
             type: 'choice',
             style: "dropdown",
@@ -39,19 +50,6 @@ export default {
             name: 'size',
             defaultValue: 5,
         },
-
-        {
-            type: 'selection',
-            name: 'edges',
-            capture: [EntityKind.EDGE],
-            label: 'edges',
-            multi: true,
-            defaultValue: {
-                usePreselection: true,
-                preselectionIndex: 0
-            },
-        },
-
     ],
 
     run: (params, ctx: ApplicationContext) => {
diff --git a/modules/workbenches/modeler/features/shell_tool/shell.operation.ts b/modules/workbenches/modeler/features/shell_tool/shell.operation.ts
index 2cb6abc9..94388fa3 100644
--- a/modules/workbenches/modeler/features/shell_tool/shell.operation.ts
+++ b/modules/workbenches/modeler/features/shell_tool/shell.operation.ts
@@ -50,8 +50,7 @@ const ShellOperation: MDFCommand<ShellParams> = {
       console.log(shellToOpperateOn);
 
       var bodyToPerformShellOpperationOn = shellToOpperateOn[0].shell;
-      oci.offsetshape(newShellName, bodyToPerformShellOpperationOn , params.thickness, "1.e-3", ...shellToOpperateOn)
-
+      oci.offsetshape(newShellName, bodyToPerformShellOpperationOn, -params.thickness, "1.e-3", ...shellToOpperateOn)
       returnObject.created.push(occ.io.getShell(newShellName));
     });
 
@@ -61,12 +60,6 @@ const ShellOperation: MDFCommand<ShellParams> = {
 
   },
   form: [
-    {
-      type: 'number',
-      name: 'thickness',
-      label: 'thickness',
-      defaultValue: 5,
-    },
     {
       type: 'selection',
       name: 'faces',
@@ -78,6 +71,12 @@ const ShellOperation: MDFCommand<ShellParams> = {
         preselectionIndex: 0
       },
     },
+    {
+      type: 'number',
+      name: 'thickness',
+      label: 'thickness',
+      defaultValue: 5,
+    },
   ],
 }