APACH LU-1116AUTO/LM Stapler with Auto Fire trigger and Long Magazine for Arrow T50 and A11 Style Staples from 1/4-Inch to 5/8-Inch Speed Adjustable, Minimum 27 Staples/Sec when Adjusted to Highest Speed Light Squeeze Trigger to Single Fire, Full Squeeze to Auto-Fire, No Adjustment Needed Hammer Cap and Rear Exhaust Low Fastener Re-Load Indicator Window Bottom Load Long Magazine - Quick Load and Easy Jam Clearance