Using the Power Roller speeds up the installation and requires less effort on the part of the installer.  Using the adjustable foot, you can fine-tune the nailer height according to different wood profiles.  No need for extra shims and pads!

The 50P Flex Power Roller is recommended for use on 3/8", 1/2" and 5/8" Tongue and Groove flooring as well as some 3/4" exotics, bamboo, and other solid wood flooring. 

The 50P Flex Power Roller uses an 18 gage Powercleat that is less likely to split the tongue on denser, more brittle woods and provides an excellent bond to the underlayment. The Powernail FLEX is designed to use cleat lengths of 1", 1-1/4", 1-1/2", and 1-3/4".