Klinch-Pak KP-GR1 Pneumatic Roll Carton Closing Stapler for GR Series Roll Staples with 1-1/4-Inch Crown and 5/8-Inch or 3/4-Inch Leg Staples Magazine Capacity holds 1000 Staples Ergonomic Handle Light Weight and Well Balanced Accepts both 5/8-inch and 3/4-inch length Fasteners Depth of Clinch and Penetration Adjustable