These Spec Ops heavy-duty staples, 1/4 in were developed for optimum performance in any Spec Ops staple gun. Constructed from excellent quality high-carbon wire to reduce buckling and jamming, these finely honed stainless steel staples delivers maximum penetration for maximum holding power. Developed from galvanized steel, these staples are also resistant to rust. These heavy-duty staples won't snap or buckle and are the ideal accessory to any carpeting, upholstery, repair or construction job. The leg length is an ideal 1/4 in or 6 mm. Each box includes 5000 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.