These reduction rings are designed to fit Stehle circular saw blades with a 30mm bore. They are made of high-quality materials, ensuring durability and longevity. The rings help to reduce the bore size of the saw blade, allowing for greater versatility and compatibility with different saws. With precise machining and a smooth finish, these reduction rings ensure a secure fit and smooth operation. They are easy to install and remove, making them a convenient accessory for any workshop.