The Surebonder 5625 TRIGGERFIRE has a mode for more power when driving staples into hard surfaces! This staple gun was redesigned to ensure easy, precise stapling with one hand. In Trigger mode, simply squeeze the handle to pre-set the staple gun, position the tool on the work surface and then squeeze the Trigger to set the staple. In normal mode, the 5625 functions as a traditional staple gun. The heavy-duty construction and easy-to-use design make even the toughest projects a breeze.