For use with the Porta-Nailer. Install the face nail shoe on the Porta-Nailer and convert the nailer from driving nails at a 45 degree angle to a 90 degree. With the face nail shoe attached you can drive nail through the top surface of the flooring. This is known as face nailing. For use with the beginning few and last few courses of flooring when too close to the wall for blind nailing ( nailing through the tongue of the flooring). Can also be used for nailing sub-floor materials to joist.