Koch (pronounced "cook") Industries, established in 1978, is the premier provider and merchandiser of high quality chain, rope and accessories in North America. These wire PTO Lock Pins are pin with a wire loop attached through the head and secured over the post at the opposite end. A wire loop at the end of the bent wire slides over the post for easy securing and removal. Similar to a clevis pin but with a wire loop attached to the end. Perfect for quick release applications. Used in farm, lawn and garden, trailer hitch receivers, and other applications to secure attachments and PTO accessories.