diff --git a/web/app/sketcher/main2d.js b/web/app/sketcher/main2d.js
index e6099af9..d9a68e68 100644
--- a/web/app/sketcher/main2d.js
+++ b/web/app/sketcher/main2d.js
@@ -184,7 +184,11 @@ TCAD.App2D = function() {
   this.registerAction('llAngle', "Angle Between 2 Lines", function () {
     app.viewer.parametricManager.llAngle(app.viewer.selected, prompt);
   });
-
+  
+  this.registerAction('symmetry', "Symmetry", function () {
+    app.viewer.parametricManager.symmetry(app.viewer.selected, prompt);
+  });
+  
   this.registerAction('analyzeConstraint', "Analyze Constraint", function () {
     app.viewer.parametricManager.analyze(alert);
   });
diff --git a/web/app/sketcher/parametric.js b/web/app/sketcher/parametric.js
index a1825b21..f6d1ca7f 100644
--- a/web/app/sketcher/parametric.js
+++ b/web/app/sketcher/parametric.js
@@ -221,6 +221,11 @@ TCAD.TWO.ParametricManager.prototype.pointInMiddle = function(objs) {
   this.add(new TCAD.TWO.Constraints.PointInMiddle(pl[0], pl[1]));
 };
 
+TCAD.TWO.ParametricManager.prototype.symmetry = function(objs) {
+  var pl = this._fetchPointAndLine(objs);
+  this.add(new TCAD.TWO.Constraints.Symmetry(pl[0], pl[1]));
+};
+
 TCAD.TWO.ParametricManager.prototype.pointOnArc = function(objs) {
   var points = this._fetch(objs, ['TCAD.TWO.EndPoint'], 1);
   var arcs = this._fetch(objs, ['TCAD.TWO.Arc', 'TCAD.TWO.Circle'], 1);
@@ -1276,6 +1281,36 @@ TCAD.TWO.Constraints.PointInMiddle.prototype.getObjects = function() {
 
 // ------------------------------------------------------------------------------------------------------------------ //
 
+/** @constructor */
+TCAD.TWO.Constraints.Symmetry = function(point, line) {
+  this.point = point;
+  this.line = line;
+  this.length = new TCAD.TWO.Ref(TCAD.math.distanceAB(line.a, line.b) / 2);
+};
+
+TCAD.TWO.Constraints.Symmetry.prototype.NAME = 'Symmetry';
+TCAD.TWO.Constraints.Symmetry.prototype.UI_NAME = 'Symmetry';
+
+TCAD.TWO.Constraints.Symmetry.prototype.getSolveData = function() {
+  var pointInMiddleData = TCAD.TWO.Constraints.PointInMiddle.prototype.getSolveData.call(this);
+  var pointOnLineData = TCAD.TWO.Constraints.PointOnLine.prototype.getSolveData.call(this);
+  return pointInMiddleData.concat(pointOnLineData);
+};
+
+TCAD.TWO.Constraints.Symmetry.prototype.serialize = function() {
+  return [this.NAME, [this.point.id, this.line.id]];
+};
+
+TCAD.TWO.Constraints.Factory[TCAD.TWO.Constraints.Symmetry.prototype.NAME] = function(refs, data) {
+  return new TCAD.TWO.Constraints.Symmetry(refs(data[0]), refs(data[1]));
+};
+
+TCAD.TWO.Constraints.Symmetry.prototype.getObjects = function() {
+  return [this.point, this.line];
+};
+
+// ------------------------------------------------------------------------------------------------------------------ //
+
 /** @constructor */
 TCAD.TWO.Constraints.Angle = function(p1, p2, p3, p4, angle) {
   this.p1 = p1;
diff --git a/web/sketcher.html b/web/sketcher.html
index 7513b698..0ff14793 100644
--- a/web/sketcher.html
+++ b/web/sketcher.html
@@ -83,11 +83,12 @@
       <button class="btn rbtn act-EntityEqualityConstraint" style="background-image: url(img/eq.png);"></button>
       <button class="btn rbtn act-tangentConstraint" style="background-image: url(img/tgn.png);"></button>
       <button class="btn rbtn act-RadiusConstraint" style="background-image: url(img/rad.png);"></button>
-      <button class="btn rbtn act-lockConstraint" ><i class="fa fa-lock"></i></button>
       <button class="btn rbtn act-pointOnLine" style="background-image: url(img/vec/pointOnLine.svg);"></button>
       <button class="btn rbtn act-pointOnArc" style="background-image: url(img/vec/pointOnArc.svg);" ></button>
       <button class="btn rbtn act-pointInMiddle" style="background-image: url(img/vec/pointInMiddle.svg);"></button>
       <button class="btn rbtn act-llAngle" style="background-image: url(img/vec/angle.svg);"></button>
+      <button class="btn rbtn act-symmetry" style="background-image: url(img/vec/symmetry.svg);"></button>
+      <button class="btn rbtn act-lockConstraint" ><i class="fa fa-lock"></i></button>
     </div>
     <div style="background: black; overflow: hidden; height: 100%;">
       <canvas width="300" height="300" id="viewer"></canvas>