Stainless-Steel Locking Ties secure exhaust wrap and solves the problem of needing a locking tie in high heat areas. Stainless-Steel Locking Ties are perfect for securing wrap to pipes with its self-locking design. Locking Ties offer many other uses including bundling wires, hoses, and other forms of insulation products. Just slide end into locking mechanism and pull tight. Constructed from high grade 316 stainless steel Capable of withstanding in excess of 2500°F 100lbs tensile strength Fits up to 4 in. O.D.