Gardner Bender 45-308UVBSC Nylon Self-Cutting Cable Tie, 8 inch, 50 lb. Tensile, Twist-Off Tail, Zip Tie, 20 Pk., UV Resistant Black SAVE TIME AND MONEY: Quick application bundling device - no need to grab extra tools. No need to buy extra items to trim tie EASY: Just simply twist the tie and tear off the extra amount when complete SMALL CUTTING BLADE inside each tie is made of stainless steel to prevent corrosion and rust 3/8 inch MINIMUM and 2 inch MAXIMUM BUNDLE DIAMETER Small cutting blade inside the head of each tie is made of stainless steel