Master Mechanic, 20 Gauge, Pneumatic Fine Wire Stapler, Anodized Aluminum Magazine Holds Up To 60 Fasteners At A Time, Anodized Aluminum Cylinder Provides A More Durable Surface When The Piston Is Firing & Retracting During Use, This Will Lead To Less Wear & Tear On The Internal Parts, 1 Piece Drive Blade, Comfortable Grip, Die-Cast Aluminum Construction, Anti-Dust Cap, Adjustable 360 Degree Exhaust Port Conveniently Directs Exhaust Away From User, Non-Marring Tip Helps Protect Your Work Surface From Any Scratches Or Marring Inflicted By The Tool, Ideal For Upholstery, Screen, Crafts, Insulation & Roofing Felt, Compatible With Arrow T50 Staples & Generic Fine Wire Staples, Accepts 20 Gauge Staples Ranging From1/4" To 9/16".