Purpose and key benefit These plastic inserts are designed for use with tire mounting machines to protect both the machine and the vehicle rim during tyre changes. The polyethylene-coated sleeves fit over the machine jaws to prevent metal-on-metal contact and reduce the risk of scratches, nicks and cosmetic damage. What they are made of Durable plastic body with a polyethylene outer coating. The combination provides long-lasting performance under repeated use while offering a non-abrasive contact surface against alloy and painted rims. How they work The polyethylene sleeves clamp securely onto the mounting machine jaws and remain in place during normal operation. The protective covering absorbs friction and prevents direct contact between the jaws and the rim, helping you avoid costly repair or refinish work. Performance and reliability Built for repeated professional use, these inserts deliver consistent protection and reliable retention on the jaws. Their durable construction resists wear from regular tyre fitting cycles and provides stable performance over time. Compatibility and function Specifically made for tire mounting machines and intended to be placed over the machine’s jaws. They protect the machine and the rim during mounting and demounting operations without altering machine function. Typical uses 1) Professional tyre shops — protect high-value alloy and painted rims while changing tyres. 2) Mobile tyre services — keep rims scratch-free when working on customer vehicles out of the shop. 3) Home or fleet garages — reduce the risk of damage when using a machine to service passenger or light-truck tyres. Why choose these inserts Simple, practical protection that reduces the risk of rim damage and extends the useful life of tire changer jaws. Durable materials and a secure fit mean fewer interruptions and lower repair costs from accidental scratches.