The 100mm x 100mm powapost bolt down fence post shoe is designed so installing fencing on an existing hard surface like concrete or a wooden base installing fence post onto decking or a concrete base may seem difficult but with a post shoe it can be simple and quick this post shoe is made from high quality zinc coated steel which is covered with a moisture resistant powder to help prevent rust to install fencing using this post shoe drill holes to fit post shoe use it as a guide then bolt