How can I detect a specific 3d model collision three.js

Question

I am trying to make clickable 3d objects with Leap Motion. I have two 3D models, IronMan helmet and a Hammer of Thor. If one of those two object is selected, then will change color. For the Iron Man will be green and for the Hammer will be white. But when I am selecting the Hammer, it changes to green instead of white. I use a cube as a pointer to select the object. Can you help?

This is the code to insert 3d models:

var colladaMeshlist = []; 
model = new THREE.Object3D()
var object;
var skin;
var objectScale = 1.5;
rotX=0, rotY=0, rotZ=0;
var loader = new THREE.ColladaLoader();
loader.options.convertUpAxis = true;
loader.load( 'models/IronMan.dae', function (collada) {
    object = collada.scene;

    object.scale.x = object.scale.y = object.scale.z = objectScale;

    object.position.x= 20;
    object.position.y= -40;
    object.position.z= 0;

    object.rotation.x= rotX;
    object.rotation.y= rotY;
    object.rotation.z= rotZ;

    object.name="IronMan";      
    colladaMeshlist.push(object);
    model.add(object);

});
scene.add(model);

model2 = new THREE.Object3D()
var object2;
var skin2;
var objectScale2 = 1;
posX=0, posY=-40, posZ=0;
rotX=0, rotY=0, rotZ=0;
var loader = new THREE.ColladaLoader();
loader.options.convertUpAxis = true;
loader.load( 'models/Hammer.dae', function (collada) {
    object2 = collada.scene;

    object2.scale.x = object2.scale.y = object2.scale.z = objectScale2;

    object2.position.x= -20;
    object2.position.y= -20;
    object2.position.z= posZ;

    object2.rotation.x= rotX;
    object2.rotation.y= rotY;
    object2.rotation.z= rotZ;
    object2.name="Hammer";  
    colladaMeshlist.push(object2);
    model2.add(object2);
});
scene.add(model2);

This is the code for selecting the objects:

      var originPoint = cube.position.clone();
      for(var vertexIndex = 0; vertexIndex < cube.geometry.vertices.length; vertexIndex++)
       {
           var localVertex = cube.geometry.vertices[vertexIndex].clone();
           var globalVertex = localVertex.applyMatrix4( cube.matrix );
           var directionVector = globalVertex.sub( cube.position );
           var ray = new THREE.Raycaster( originPoint, directionVector.clone().normalize() );
           var collisionResults = ray.intersectObjects(colladaMeshlist, true);

           if(collisionResults.length > 0 && collisionResults[0].distance < directionVector.length())  
          {
             collisionResults[0].object.material.color.setHex(0x4CAF50);
          } 
          else if (collisionResults.length > 0 && collisionResults[1].distance < directionVector.length())
          {
             collisionResults[1].object.material.color.setHex(0xffffff);
          }
  }