This is a high-quality chain tensioner assembly that is compatible with the McCulloch Super Pro 125 105 CP125 105 1-41 550 chainsaw models. It is made of durable materials and designed to ensure a secure and reliable fit. The tensioner helps to keep the chain tight and functioning properly, making it an essential component for any chainsaw user. Whether you're a professional landscaper or a DIY enthusiast, this chain tensioner assembly is an ideal choice for improving the performance and reliability of your chainsaw. It is easy to install and requires no special tools or expertise. With its high-quality construction and dependable performance, you can be confident that your chainsaw will be ready for any task at hand.