Get reliable, handheld stapling with the Optima 20 Stapler.Jam Free guaranteed for fast, high-volume stapling when used with Swingline S.F. 4 Premium or Optima Premium Staples. Staples up to 20 sheets at once. Operates quietly without compromising power or speed. Easily switch between stapling modes with the user control switch. Features automatic and manual stapling modes for flexible operation. QuickLoad technology for easy staple reloading. Eject empty staple magazines with the press of a button. Built-in Intelligent Paper Alignment Guide and Stack Height Gauge assist in accurate staple placement and sheet count measuring. Operate using battery power or with the included AC adapter. Four AA batteries required (not included). Not compatible with rechargeable batteries. 100% performance guarantee.