These nylon tire changer head inserts are rim protection kits designed for metal mount heads with duck-head style fittings and are compatible with most common tire changer mount/demount heads. They convert the metal roller to a nylon insert, reducing wheel contact and preventing damage during mounting and demounting. Material: nylon plastic. Benefits - Protect wheels from scraping and gouging caused by metal heads during tire mounting and demounting. - Simple, tool-free conversion: unbolt the steel roller and bolt in the nylon insert—no modification needed. - Durable nylon construction provides reliable wheel protection for a range of wheel types and sizes. - Suitable for use with standard duck-head metal mount heads and common tire changer configurations. Installation and compatibility - Easy to install by replacing the steel roller with the nylon insert; no alterations to the machine required. - Works with most common tire changer mount/demount heads that use a metal duck-head style head. Use scenarios - Professional tire shop: protects alloy and steel wheels during high-volume tire changes, reducing risk of wheel damage. - Home garage: upgrades equipment by replacing the metal roller with a nylon insert to minimize wheel wear. - When handling high-value or finished wheels: preserves finish and reduces risk during mounting and demounting. This product provides a reliable, cost-effective way to extend wheel life and maintain finish by using a nylon insert in place of the metal head roller.