With a simple hardware change (two nuts and a screw), the 421P becomes a face nailer or angle nailer, saving you time and exertion on those first and last few rows of face-nailed flooring and speeding you through the rest of the installation. Connected to a compressor, the 421P needed only a squeeze of the safety trigger and light mallet blow to pneumatically drive the 2-inch serrated nails through the tongue and into the subfloor. Porta-Nails’ exclusive "ratcheting ram" doesn’t return to the start position until the fastener is properly seated, so you know every nail you drive is doing its job.