KAMSIN N851 Pneumatic Construction Stapler, 16 Gauge, 7/16-Inch Crown[SECURED OPERATION] With touch strike security system, the stapler will be locked automatically and shot only when the muzzle touches the working surface, efficiently preventing accidental shooting and protecting user at work. [HANDY & TOUGHTFUL DESIGN] The magazine is high capacity and open design, with a spring pull loading buckle. It can hold 150 staples to minimize the need for replenishment and allow for easy observation of staples consumption