Features:* Used for different angle grinder saw blade.* Suitable for circular saws.* Package includes 7pcs saw sleeves, size includes 16-25.4mm, 16-22mm, 16-20mm, 20-25.4mm, 20-22mm, 22-25.4mm, 25.4-30mm.* Durable and long service life. Specifications:Product Name: Circular Saw RingMaterial: MetalSize: (Approx.) Inner Diameter: 16mm Outer Diameter: 25.4mmInner Diameter: 16mm Outer Diameter: 22mmInner Diameter: 16mm Outer Diameter: 20mmInner Diameter: 20mm Outer Diameter: 25.4mmInner Diameter: 20mm Outer Diameter: 22mmInner Diameter: 22mm Outer Diameter: 25.4mmInner Diameter: 25.4mm Outer Diameter: 30mmColor: SilverSuitable for: Saw Blades Circular Saw RingQuantity: 7pcs/setPackage Contents:7pcs/set Circular Saw RingNote:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.