The Peterbilt Full Locking Main Differential Switch Guard is a practical and durable accessory made of stainless steel. Designed to fit most Peterbilt makes and models, this switch guard provides added security and protection for your vehicle's main differential switch. With its engage/lock/unlock functionality, it ensures ease of use and peace of mind. Sold individually, this stainless steel guard is a reliable and long-lasting solution for safeguarding your Peterbilt's main differential switch.