Patented Trigger Design gives you ultimate power with minimal effort. In Trigger mode, simply squeeze the staple gun handle, position on the workpiece, and pull the trigger to set the staple. Ideal for hard-to-reach areas and accuracy. Easy drop in staple loading, adjustable depth drive, fabric/screen gripper. Viewing window lets you know if you need to load staples. Use with Surebonder #4 or Arrow type T50 heavy duty staples.