With a large capacity magazine of 300 nails and a maximum fastener size of 2 ½” x .131”, the safety equipped CN665D SuperDecking® tool is ideal for sheathing, subflooring, roof decking, exterior deck, siding, fencing, exterior trim, furring, and strapping jobs. With an integrated rapid-fire trigger which enables high-speed fastening, carpenters can quickly finish their installations, reducing the probability of developing fatigue while you work.