The Surebonder 5625 TRIGGERFIRE 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 makes even the toughest projects a breeze. This kit includes 2 packs of each Surebonder #4 staple size. Staples sizes included are: 1/4", 5/16", 3/8", 1/2", & 9/16" staple leg lengths.