Klinch-Pak KP-APN Pneumatic Carton Closing Stapler for A Series Staples 1-3/8-Inch Crown and 5/8-Inch or 3/4-Inch Leg Ergonomic Handle Light Weight and Well Balanced Accepts both 5/8-inch and 3/4-inch length Fasteners Depth of Clinch and Penetration Adjustable