304 Stainless Steel Self Locking Zip Tie For Automotive Application Such As Exhaust Heat Wrap. Can Support Temperature Up To 1000 °F. Don't Need To Worry About Heat And Corrosion. Perfect For Indoor and Outdoor Applications. High-Quality Material Our zip tie is made of 304 stainless steel with an operating temperature range of minus 112 °F. to 1000 °F. They have great toughness, corrosion resistance, fire resistance, and longer service time, which could be used in various environments such as wet places, outdoors, places with high temperatures, and so on. Special Design & Easy to Use These locking tie wraps are designed with a thickened buckle to reinforce the tie. In addition, the buckle contains stainless steel balls to keep ties from loosing after being clamped. Last but not least, you completely don't need any tools to install them, as easily as a zipper.