Created for maximum drive, control and rapid stapling, these Spec Ops Heavy-Duty Staples, 5/16 inch are compatible with all Spec Ops Staple Guns and Hammer Tackers. These heavy-duty staples are made from high-carbon steel wire to help resist jamming and feature finely honed chisel points for quick, easy piercing. For use with any insulation, upholstery and carpentry job, these staples have maximum penetration and withstand any rust. Each box includes 5,000 staples. With each Spec Ops Tools purchase made, we support our nation's heroes by donating 3% of proceeds to veteran and first responder causes.