The Spec Ops Heavy Duty Staples are compatible with all Spec Ops Staple Guns. Manufactured with superior quality high carbon wire to reduce buckling and jamming, these stainless steel staples are best used for any flooring, woodworking, carpentry and upholstery work, among many other construction jobs. With a 9/16-inch leg length, these heavy-duty staples ensure a long-lasting durable hold that is also resistant to 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.