Pneumatic Stapling Plier, 1/2" Staple SizeModel PA457 is a powerful, heavy duty plierstapler used for fastening corrugated containers, pallet boxes and container inserts Positive, controlled clinching action One inch opening between clinch blade and driver; can be used over obstacles such as box flanges, eliminates the need to diecut for plier blade insertion Six inches deep throat forplacement well in from edge Operates over 30 to 55 PSI air pressure Drives 3 ribbon wire staplesizes: 3 8", 1