Product description: These circular saw blades are made of high-quality high-speed steel and are extremely durable. The blade teeth are very sharp, ensuring fast and smooth cutting.❤❤Brand name : NIKOLay❤❤Material: Electroplated diamond❤❤Size: 25mm Monolithic diameter of about 25mm, error of about 5mm 18mm Monolithic diameter about 18mm, error about 5mm 22mm Monolithic diameter is about 22mm, error is about 5mm❤❤Package Including: 1pc❤❤❤Notice: 100% Satisfaction Guarantee: If you have any problems on our products,please feel free to contact us at any time.