Air Locker M641 Manual Staple Gun shoot both 20 gauge T50 3/8" crown 1/4" to 9/18" and 18 gauge brads upto 5/8" length Safety lock will not allow direct shooting. Quick bottom load magazine to get back to work faster. Light weight Aluminum body for easy use. Perfect for everyday stapling needs around home or office.Low strike handle to reduce fatigue and an impact buffer to reduce shock and kick.