NS20XP, 16 Gauge, 7/16", Crown Stapler, Uses 16 & 17 Gauge 7/16 In. Crown Heavy Wire Staples, 1" To 2" Fastener Range, 15 Percent More Powerful Than All Other Construction Staplers In Its Class, Enhanced EZ-Clear Latch Allows For Quick Access To Clear Fasteners & A New Aggressive Locking Feature Provides Superior Holding Power For Complete Control Of The Fastener, Offering Pinpoint Accuracy & Unrivaled Drivability, New Drive Track Design Eliminates Movement Of The Staple, Enhancing Overall Drive Performance & Virtually Eliminating Fastener Jams, Skipping & Misfires, Rotatable Belt Hook, Can Be Converted For Use As Vinyl Siding Stapler (Vinyl Siding Attachment Required - Sold Separately), Includes: Tool Oil.