Senco NS20XP 16 Gauge 7/16" Crown Stapler uses 16 & 17 Gauge 7/16" Crown Heavy Wire Staples with a fastener range of 1" to 2". It is 15% more powerful than all other construction staplers in its class, making it ideal for heavy-duty applications. The enhanced EZ-Clear latch allows for quick access to clear fasteners, and a new aggressive locking feature provides superior holding power for complete control of the fastener. The new drive track design eliminates movement of the staple, enhancing overall drive performance and virtually eliminating fastener jams, skipping, and misfires. It has a rotatable belt hook and can be converted for use as a vinyl siding stapler (vinyl siding attachment required - sold separately). It includes tool oil. Setting the new standard for class-leading power and tool durability, the NS20XP is the industry benchmark for construction staplers.