2", 16 gauge flooring nail. For the tightest floor possible choose the L PortaNail by PNI. L Nails are designed specifically for nailing tongue and groove wood floors using the Porta Nailer Portamatic TL pneumatic nailer. The L head flooring nail or cleat, will fit all domestic and import floor nailers requiring a 2" or 50mm L nail fastener. The PNI wide head wedge shaped design with well defined barbs prevents the nail from backing out. This design feature provides for the greatest impact and holding power to ensure that your floor lasts a lifetime. Nails are glued into clips to make loading into your tool quick and easy. 1 pack of 1000 PortaNails will nail approximately 200 sq. ft. of tongue and groove flooring.