The 550ACR is powered by the PRIMPACT striking module and comes standard with the PrimSurfer roller base combining undeniable versatility. The cam operated height adjuster allows for precise positioning of the fastener on products from 3/8″ to 3/4″ and the PrimSurfer fulfills the need for increased Speed and Precision in large surface as well as residential flooring jobs. Its two-way fluid sideshift extends the natural hand movement and matches the agility of the installer, allowing a constant, comfortable posture that prevents “top nailing”. Not having to lift the tool repeatedly eases off the feeling of tension in the user’s arm and back.