Hitachi's NT50AF 2-in. T & L flooring nailer accepts both T and L shaped 16-gauge cleats (nails) from 1-3/16 in. up to 2 in. in length for installing 1/2in. or 3/4in. domestic solid wood flooring. The NT50AF features a "preferred seating system," which guarantees accurate placement of each cleat at the proper angle and depth to produce straight boards and secure tongue and groove flooring.