16 GAUGE (THICKNESS) 1/2 inches size. Great for Heavy Duty Work, Strong, secure, durable, and weather resistant Galvanized Steel hog rings USES: Perfect Uses for Auto, Furniture, Upholstery, Fences, Chicken Coops, Meat and Sausage casing, Traps, arts and Craft , Fencing Repairs, and so much more Compatible Tools: BeA HR60-22, CL24-HR, SC7B, and other hog ring pliers. Great for Heavy Duty Jobs Upholstery Crafting Projects 38 GAUGE (THICKNESS) 3/4 inches size. Great for Heavy Duty Work, Strong, secure, durable, and weather resistant