diff --git a/ereuse_devicehub/inventory/forms.py b/ereuse_devicehub/inventory/forms.py
index 9bf31d33..b1fdb645 100644
--- a/ereuse_devicehub/inventory/forms.py
+++ b/ereuse_devicehub/inventory/forms.py
@@ -317,6 +317,7 @@ class NewDeviceForm(FlaskForm):
     id_device_supplier = StringField('Id Supplier', [validators.Optional()])
     phid = StringField('Placeholder Hardware identity (Phid)', [validators.Optional()])
     pallet = StringField('Identity of pallet', [validators.Optional()])
+    components = TextAreaField('Components', [validators.Optional()])
     info = TextAreaField('Info', [validators.Optional()])
     serial_number = StringField('Seria Number', [validators.Optional()])
     model = StringField('Model', [validators.Optional()])
@@ -392,6 +393,7 @@ class NewDeviceForm(FlaskForm):
         self.phid.data = self._obj.placeholder.phid
         self.pallet.data = self._obj.placeholder.pallet
         self.info.data = self._obj.placeholder.info
+        self.components.data = self._obj.placeholder.components
         self.serial_number.data = self._obj.serial_number
         self.model.data = self._obj.model
         self.manufacturer.data = self._obj.manufacturer
@@ -420,6 +422,7 @@ class NewDeviceForm(FlaskForm):
             self.id_device_supplier.render_kw = disabled
             self.pallet.render_kw = disabled
             self.info.render_kw = disabled
+            self.components.render_kw = disabled
             self.serial_number.render_kw = disabled
             self.model.render_kw = disabled
             self.manufacturer.render_kw = disabled
@@ -595,6 +598,7 @@ class NewDeviceForm(FlaskForm):
                 'phid': self.phid.data or None,
                 'id_device_supplier': self.id_device_supplier.data,
                 'info': self.info.data,
+                'components': self.components.data,
                 'pallet': self.pallet.data,
                 'is_abstract': False,
             }
@@ -608,6 +612,7 @@ class NewDeviceForm(FlaskForm):
                 self.id_device_supplier.data or None
             )
             self._obj.placeholder.info = self.info.data or None
+            self._obj.placeholder.components = self.components.data or None
             self._obj.placeholder.pallet = self.pallet.data or None
             self._obj.model = self.model.data
             self._obj.manufacturer = self.manufacturer.data
@@ -1662,8 +1667,8 @@ class BindingForm(FlaskForm):
             self.phid.errors = [txt]
             return False
 
-        if self.device.placeholder:
-            txt = "This is not a device Workbench."
+        if self.device.is_abstract() != 'Abstract':
+            txt = "This is not a abstract device."
             self.phid.errors = [txt]
             return False
 
diff --git a/ereuse_devicehub/inventory/views.py b/ereuse_devicehub/inventory/views.py
index 8d0eafb7..6239d98c 100644
--- a/ereuse_devicehub/inventory/views.py
+++ b/ereuse_devicehub/inventory/views.py
@@ -191,6 +191,14 @@ class BindingView(GenericMixin):
             .one()
         )
 
+        if device.is_abstract() != 'Abstract':
+            next_url = url_for('inventory.device_details', id=dhid)
+            messages.error('Device "{}" not is a Abstract device!'.format(dhid))
+            return flask.redirect(next_url)
+
+        if device.placeholder:
+            device = device.placeholder.binding
+
         if request.method == 'POST':
             old_placeholder = device.binding
             old_device_placeholder = old_placeholder.device
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 76f1d2ad..a50d1593 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -667,13 +667,18 @@ class Device(Thing):
             action.functionality_range = value
 
     def is_abstract(self):
-        if not self.placeholder:
-            return ''
-        if self.placeholder.is_abstract:
-            return 'Abstract'
-        if self.placeholder.binding:
+        if self.placeholder:
+            if self.placeholder.is_abstract:
+                return 'Abstract'
+            if self.placeholder.binding:
+                return 'Twin'
+            return 'Real'
+        if self.binding:
+            if self.binding.is_abstract:
+                return 'Abstract'
             return 'Twin'
-        return 'Real'
+
+        return ''
 
     def is_status(self, action):
         from ereuse_devicehub.resources.device import states
@@ -878,6 +883,7 @@ class Placeholder(Thing):
     phid = Column(Unicode(), nullable=False, default=create_phid)
     pallet.comment = "used for identification where from where is this placeholders"
     info = db.Column(CIText())
+    components = Column(CIText())
     info.comment = "more info of placeholders"
     is_abstract = db.Column(Boolean, default=False)
     id_device_supplier = db.Column(CIText())
diff --git a/ereuse_devicehub/templates/inventory/device_create.html b/ereuse_devicehub/templates/inventory/device_create.html
index a8bcf221..cdf674a3 100644
--- a/ereuse_devicehub/templates/inventory/device_create.html
+++ b/ereuse_devicehub/templates/inventory/device_create.html
@@ -142,6 +142,19 @@
                       {% endif %}
                     </div>
 
+                    <div class="form-group mb-2">
+                      <label for="label" class="form-label">{{ form.components.label }}</label>
+                      {{ form.components(class_="form-control") }}
+                      <small class="text-muted form-text">Description of components</small>
+                      {% if form.components.errors %}
+                      <p class="text-danger">
+                        {% for error in form.components.errors %}
+                          {{ error }}<br/>
+                        {% endfor %}
+                      </p>
+                      {% endif %}
+                    </div>
+
                     <div class="from-group has-validation mb-2" id="Serial_number">
                       <label for="serialNumber" class="form-label">{{ form.serial_number.label }}</label>
                       {{ form.serial_number(class_="form-control") }}
diff --git a/ereuse_devicehub/templates/inventory/device_detail.html b/ereuse_devicehub/templates/inventory/device_detail.html
index 81b02e25..9f46e787 100644
--- a/ereuse_devicehub/templates/inventory/device_detail.html
+++ b/ereuse_devicehub/templates/inventory/device_detail.html
@@ -62,13 +62,13 @@
               <button class="nav-link" data-bs-toggle="tab" data-bs-target="#components">Components</button>
             </li>
 
-           {% if device.binding %}
+           {% if device.is_abstract() == 'Abstract' %}
             <li class="nav-item">
               <button class="nav-link" data-bs-toggle="tab" data-bs-target="#binding">Binding</button>
             </li>
             {% endif %}
 
-           {% if device.placeholder and placeholder.binding and device.is_abstract() != 'Abstract'%}
+           {% if device.is_abstract() == 'Twin' %}
             <li class="nav-item">
               <a class="nav-link" href="{{ url_for('inventory.unbinding', phid=placeholder.phid) }}">Unbinding</a>
             </li>
@@ -102,17 +102,17 @@
 
               <div class="row">
                 <div class="col-lg-3 col-md-4 label">Manufacturer</div>
-                <div class="col-lg-9 col-md-8">{{ device.manufacturer }}</div>
+                <div class="col-lg-9 col-md-8">{{ device.manufacturer or ''}}</div>
               </div>
 
               <div class="row">
                 <div class="col-lg-3 col-md-4 label">Model</div>
-                <div class="col-lg-9 col-md-8">{{ device.model }}</div>
+                <div class="col-lg-9 col-md-8">{{ device.model or ''}}</div>
               </div>
 
               <div class="row">
                 <div class="col-lg-3 col-md-4 label">Serial Number</div>
-                <div class="col-lg-9 col-md-8">{{ device.serial_number }}</div>
+                <div class="col-lg-9 col-md-8">{{ device.serial_number or ''}}</div>
               </div>
             </div>
 
@@ -222,6 +222,7 @@
 
             <div class="tab-pane fade profile-overview" id="components">
               <h5 class="card-title">Components Details</h5>
+              {% if device.binding %}
               <div class="list-group col-6">
                 {% for component in device.components|sort(attribute='type') %}
                 <div class="list-group-item">
@@ -241,8 +242,13 @@
                 </div>
                 {% endfor %}
               </div>
+              {% else %}
+              <div class="col-6">
+                  {{ device.placeholder.components or '' }}
+              </div>
+              {% endif %}
             </div>
-            {% if placeholder.binding %}
+            {% if device.is_abstract() %}
             <div class="tab-pane fade {% if active_binding %}show active{% else %}profile-overview{% endif %}" id="binding">
               <h5 class="card-title">Binding</h5>
               <div class="list-group col-6">
@@ -252,7 +258,7 @@
                 </p>
               </div>
               <div class="list-group col-6">
-                  <form action="{{ url_for('inventory.device_details', id=placeholder.binding.devicehub_id) }}" method="post">
+                  <form action="{{ url_for('inventory.device_details', id=device.devicehub_id) }}" method="post">
                   {{ form_binding.csrf_token }}
                   {% for field in form_binding %}
                   {% if field != form_binding.csrf_token %}