"The Richco Kurly Lock holds wires and cables up to 20 lbs. tensile strength. The rounded edges on the Kurly lock prevent abrasion. Available in Nylon 6/6, RMS-01, Natural color. Underwriter Laboratories approved UL #E71558. "... Click here for more info on Kurly Lock KL-250 (.91 Height) Qty. 1000.